tcolorbox (2mar19)

git-svn-id: svn://tug.org/texlive/trunk@50206 c570f23f-e606-0410-a88d-b1316a301751

19 files changed, 219 insertions, 199 deletions

diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
index 5595685288d..69f5899e5c5 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbbreakable.code.tex: Code for breakable colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \let\tcb@parboxrestore@true=\tcb@parboxrestore
 \let\tcb@parboxrestore@false\tcb@parbox@false@settings
@@ -169,7 +169,7 @@
   \else%
     \tcb@hasTitletrue%
     \tcbdimto\tcb@w@title{\tcb@innerwidth-\kvtcb@boxsep*2-\kvtcb@lefttitle-\kvtcb@righttitle}%
-    \begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}\tcb@extras@followingtitle\color{tcbcol@title}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@followingtitle\end{tcb@savebox}%
+    \begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}\tcb@extras@followingtitle\color{tcbcoltitle}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@followingtitle\end{tcb@savebox}%
     \tcbdimto\tcb@h@title{\ht\tcb@titlebox+\dp\tcb@titlebox}%
     \tcbdimto\tcb@h@padtitle{\kvtcb@title@rule+\kvtcb@boxsep*2+\kvtcb@toptitle+\kvtcb@bottomtitle+\tcb@h@title}%
   \fi%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
index a26bde8045f..ecd2d24dd22 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbdocumentation.code.tex: Code for LaTeX documentations
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{listings,skins,xparse,external}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
index 3252746db12..0f3f68546ff 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbexternal.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbexternal.code.tex: Code for externalization
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{pro@cessing}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
index b819afaad87..7e32bdec72b 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbfitting.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbfitting.code.tex: Code for fit boxes
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \newdimen\tcbfitdim
 \newdimen\tcb@lowerfitdim
@@ -226,7 +226,7 @@
 \def\tcb@fit@@box{%
   \iftcb@hasTitle%
     \tcbdimto\tcb@w@title{\kvtcb@width-(\kvtcb@left@rule)-(\kvtcb@right@rule)-(\kvtcb@boxsep)*2-(\kvtcb@lefttitle)-(\kvtcb@righttitle)}%
-    \begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}\color{tcbcol@title}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\kvtcb@title\kvtcb@after@title\end{tcb@savebox}%
+    \begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}\color{tcbcoltitle}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\kvtcb@title\kvtcb@after@title\end{tcb@savebox}%
     \tcbdimto\tcb@h@titletotal{\ht\tcb@titlebox+\dp\tcb@titlebox+\kvtcb@title@rule+(\kvtcb@boxsep)*2+\kvtcb@toptitle+\kvtcb@bottomtitle}%
   \else%
     \let\tcb@h@titletotal=\tcb@zpt%
@@ -254,10 +254,10 @@
   \def\tcb@fit@@boxsave##1{%
     \tcbdimto\tcb@innerwidth{\kvtcb@width-\kvtcb@left@rule-\kvtcb@right@rule}%
     \colorlet{tcbcol@origin}{.}%
-    \tcb@set@color{tcbcol@upper}%
+    \tcb@set@color{tcbcolupper}%
     \begin{tcb@savebox}{\tcb@upperbox}{##1}%
       \kvtcb@fontupper\fontsize{\tcbfitdim}{\tcb@fit@@line}\selectfont%
-      \kvtcb@halignupper\kvtcb@before@upper\ignorespaces#1\ifvmode\else\unskip\fi\kvtcb@after@upper%
+      \kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper%
     \end{tcb@savebox}%
     \tcb@reset@color%
     \advance\count@ 1\relax%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
index abc3c87ec98..d0e0acae721 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbhooks.code.tex: Code for adding hooks
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbset{%
   before upper app/.code={\appto\kvtcb@before@upper{#1}},%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
index d24293530eb..418618ad6ba 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcblistings.code.tex: Code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{listings}[2007/02/22]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex
index 5e9dfb99abd..2906d28c356 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingscore.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcblistingscode.code.tex: Auxiliary code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{pro@cessing}
 
@@ -41,8 +41,8 @@
 
 \newenvironment{tcb@lower@outside}[1]{%
   \tcbset{savedelimiter=tcb@lower@outside}\tcb@minipage{#1}%
-  \color{tcbcol@lower}\kvtcb@fontlower\kvtcb@halignlower\kvtcb@before@lower\ignorespaces}%
-  {\ifvmode\else\unskip\fi\kvtcb@after@lower\endminipage}
+  \color{tcbcollower}\kvtcb@fontlower\kvtcb@halignlower\tcb@insert@before@lower}%
+  {\tcb@insert@after@lower\endminipage}
 
 \def\tcb@use@listing@other@reset{%
   \tcbset{every box on layer 1/.style={reset,every box}}%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
index ed0318f08cc..46720bc9803 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcblistingsutf8.code.tex: Code for colorboxes with listings in UTF-8
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{listingsutf8}[2011/11/10]
 \tcbuselibrary{listings}
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex
index fce4fc2944b..75c4ef5e399 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbmagazine.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbmagazine.code.tex: Code for box sets and magazine styles
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{breakable}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex
index d34ce36c8e7..220d7d82f7a 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbminted.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbminted.code.tex: Code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{minted}[2011/09/17]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex
index 0e3a170cd69..057e02b30f9 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbposter.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbposter.code.tex: Code for posters
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{breakable,magazine,skins,fitting}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex
index 5afca346a2c..773d095bc88 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbprocessing.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbprocessing.code.tex: Code for conditional processing
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{pdftexcmds}
 \RequirePackage{shellesc}
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex
index b4c9e5f51cf..aab39967d69 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbraster.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbskinsjigsaw.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \newcounter{tcbrastercolumn}
 \newcounter{tcbrasterrow}
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
index f8d1b0303cc..b209a86e706 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbskins.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{tikz}[2010/10/13]
 
@@ -109,9 +109,9 @@
 }
 
 \tikzset{%
-  tcb fill frame/.style={fill=tcbcol@frame,fill opacity=\kvtcb@opacityframe,tcb@spec,frame@style},%
-  tcb fill interior/.style={fill=tcbcol@back,fill opacity=\kvtcb@opacityback,tcb@spec,interior@style},%
-  tcb fill title/.style={fill=tcbcol@backtitle,fill opacity=\kvtcb@opacitybacktitle,tcb@spec,title@style},%
+  tcb fill frame/.style={fill=tcbcolframe,fill opacity=\kvtcb@opacityframe,tcb@spec,frame@style},%
+  tcb fill interior/.style={fill=tcbcolback,fill opacity=\kvtcb@opacityback,tcb@spec,interior@style},%
+  tcb fill title/.style={fill=tcbcolbacktitle,fill opacity=\kvtcb@opacitybacktitle,tcb@spec,title@style},%
 }
 
 % fill frame
@@ -166,10 +166,10 @@
 % draw segmentation line
 \def\tcb@drawlower@path{%
   \iftcb@sidebyside%
-    \path[draw=tcbcol@frame,fill opacity=\kvtcb@opacityframe,dash pattern=on 1mm off 1mm,dash phase=0.5mm,tcb@spec,segmentation@style]
+    \path[draw=tcbcolframe,fill opacity=\kvtcb@opacityframe,dash pattern=on 1mm off 1mm,dash phase=0.5mm,tcb@spec,segmentation@style]
     (segmentation.north)--(segmentation.south);%
   \else%
-    \path[draw=tcbcol@frame,fill opacity=\kvtcb@opacityframe,dash pattern=on 1mm off 1mm,dash phase=0.5mm,tcb@spec,segmentation@style]
+    \path[draw=tcbcolframe,fill opacity=\kvtcb@opacityframe,dash pattern=on 1mm off 1mm,dash phase=0.5mm,tcb@spec,segmentation@style]
     (segmentation.west)--(segmentation.east);%
   \fi%
 }
@@ -256,7 +256,7 @@
 }
 
 \def\tcb@drawspec@T{%
-  \tcb@pathbase{top color=tcbcol@frame,bottom color=tcbcol@back,fill opacity=\kvtcb@opacitybacktitle}{[yshift=-0.01pt]interior.north west}{[yshift=0.01pt]title.south east}%
+  \tcb@pathbase{top color=tcbcolframe,bottom color=tcbcolback,fill opacity=\kvtcb@opacitybacktitle}{[yshift=-0.01pt]interior.north west}{[yshift=0.01pt]title.south east}%
   {\tcb@arc@zpt}{\tcb@arc@zpt}{\tcb@arc@zpt}{\tcb@arc@zpt}%
 }
 
@@ -270,7 +270,7 @@
 \def\tcb@drawframe@spartan{%
   \begin{pgfscope}%
   \pgfpathrectangle{\pgfpointorigin}{\pgfqpoint{\tcb@width}{\tcb@height}}%
-  \pgfsetfillcolor{tcbcol@frame}%
+  \pgfsetfillcolor{tcbcolframe}%
   \pgfsetfillopacity{\kvtcb@opacityframe}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -280,7 +280,7 @@
   \begin{pgfscope}%
   \pgfpathrectanglecorners{\pgfqpoint{\kvtcb@left@rule}{\kvtcb@bottom@rule}}%
    {\pgfqpoint{\the\dimexpr\tcb@width-\kvtcb@right@rule\relax}{\the\dimexpr\kvtcb@bottom@rule+\tcb@innerheight\relax}}%
-  \pgfsetfillcolor{tcbcol@back}%
+  \pgfsetfillcolor{tcbcolback}%
   \pgfsetfillopacity{\kvtcb@opacityback}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -290,7 +290,7 @@
   \begin{pgfscope}%
   \pgfpathrectanglecorners{\pgfqpoint{\kvtcb@left@rule}{\kvtcb@bottom@rule}}%
    {\pgfqpoint{\the\dimexpr\tcb@width-\kvtcb@right@rule\relax}{\the\dimexpr\tcb@height-\kvtcb@top@rule\relax}}%
-  \pgfsetfillcolor{tcbcol@back}%
+  \pgfsetfillcolor{tcbcolback}%
   \pgfsetfillopacity{\kvtcb@opacityback}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -300,7 +300,7 @@
   \begin{pgfscope}%
   \pgfpathrectanglecorners{\pgfqpoint{\kvtcb@left@rule}{\the\dimexpr\kvtcb@bottom@rule+\tcb@innerheight+\kvtcb@title@rule\relax}}%
    {\pgfqpoint{\the\dimexpr\tcb@width-\kvtcb@right@rule\relax}{\the\dimexpr\tcb@height-\kvtcb@top@rule\relax}}%
-  \pgfsetfillcolor{tcbcol@backtitle}%
+  \pgfsetfillcolor{tcbcolbacktitle}%
   \pgfsetfillopacity{\kvtcb@opacitybacktitle}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -317,7 +317,7 @@
   \pgfpathmoveto{\pgfqpoint{\kvtcb@left@rule}{\tcb@seg@pos}}%
   \pgfpathlineto{\pgfqpoint{\the\dimexpr\tcb@width-\kvtcb@right@rule\relax}{\tcb@seg@pos}}%
   \fi%
-  \pgfsetcolor{tcbcol@frame}%
+  \pgfsetcolor{tcbcolframe}%
   \pgfsetstrokeopacity{\kvtcb@opacityframe}%
   \pgfusepath{stroke}%
   \end{pgfscope}%
@@ -376,7 +376,7 @@
       \path[draw,line width=\kvtcb@title@rule+1000sp,#1]
         ([yshift=-\kvtcb@title@rule/2]title.south west)--([yshift=-\kvtcb@title@rule/2]title.south east);
     \fi}},%
-  colbacklower/.colorlet=tcbcol@backlower,%
+  colbacklower/.colorlet=tcbcolbacklower,%
   clear@spec/.code={\tcb@spec{}},%
   tikz/.code={\appto\tcb@tikz@option@hook{,#1}},%
   tikz reset/.code={\let\tcb@tikz@option@hook\@empty},%
@@ -511,30 +511,30 @@
   interior titled code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@path}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@path}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@UT%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@UT%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithtitle@path}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithtitle@path}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@path}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@path}%
     \fi\tcb@spec{}},
   interior code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@path}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@path}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@UR%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@UR%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithouttitle@path}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithouttitle@path}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@path}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@path}%
     \fi\tcb@spec{}},
   segmentation code={\iftcb@sidebyside%
-    \iftcb@hasTitle\tcb@drawspec@sbs@B{fill=tcbcol@backlower}\else%
-    \tcb@drawspec@sbs@A{fill=tcbcol@backlower}\fi\else\tcb@drawspec@LR{fill=tcbcol@backlower}\fi\tcb@spec{}},%
+    \iftcb@hasTitle\tcb@drawspec@sbs@B{fill=tcbcolbacklower}\else%
+    \tcb@drawspec@sbs@A{fill=tcbcolbacklower}\fi\else\tcb@drawspec@LR{fill=tcbcolbacklower}\fi\tcb@spec{}},%
   skin first=bicolorfirst,skin middle=bicolormiddle,skin last=bicolorlast}
 
 \tcbset{bicolor/.style={skin=bicolor}}
@@ -544,30 +544,30 @@
   interior titled code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@pathfirst}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@pathfirst}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@UT%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@UT%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithtitle@pathfirst}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithtitle@pathfirst}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@pathfirst}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@pathfirst}%
     \fi\tcb@spec{}},
   interior code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@pathfirst}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@pathfirst}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@UR%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@UR%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithouttitle@pathfirst}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithouttitle@pathfirst}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@pathfirst}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@pathfirst}%
     \fi\tcb@spec{}},
   segmentation code={\iftcb@sidebyside%
-    \iftcb@hasTitle\tcb@drawspec@sbs@D{fill=tcbcol@backlower}\else%
-    \tcb@drawspec@sbs@C{fill=tcbcol@backlower}\fi\else\tcb@drawspec@LS{fill=tcbcol@backlower}\fi\tcb@spec{}},%
+    \iftcb@hasTitle\tcb@drawspec@sbs@D{fill=tcbcolbacklower}\else%
+    \tcb@drawspec@sbs@C{fill=tcbcolbacklower}\fi\else\tcb@drawspec@LS{fill=tcbcolbacklower}\fi\tcb@spec{}},%
   skin first=bicolorfirst,skin middle=bicolormiddle,skin last=bicolormiddle}
 
 \tcb@new@skin{bicolormiddle}{base@middle,%
@@ -575,30 +575,30 @@
   interior titled code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@pathmiddle}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@pathmiddle}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@UT%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@UT%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithtitle@pathmiddle}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithtitle@pathmiddle}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@pathmiddle}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@pathmiddle}%
     \fi\tcb@spec{}},%
   interior code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@pathmiddle}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@pathmiddle}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@US%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@US%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithouttitle@pathmiddle}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithouttitle@pathmiddle}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@pathmiddle}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@pathmiddle}%
     \fi\tcb@spec{}},
   segmentation code={\iftcb@sidebyside%
-    \iftcb@hasTitle\tcb@drawspec@sbs@D{fill=tcbcol@backlower}\else%
-    \tcb@drawspec@sbs@E{fill=tcbcol@backlower}\fi\else\tcb@drawspec@LS{fill=tcbcol@backlower}\fi\tcb@spec{}},%
+    \iftcb@hasTitle\tcb@drawspec@sbs@D{fill=tcbcolbacklower}\else%
+    \tcb@drawspec@sbs@E{fill=tcbcolbacklower}\fi\else\tcb@drawspec@LS{fill=tcbcolbacklower}\fi\tcb@spec{}},%
   skin first=bicolormiddle,skin middle=bicolormiddle,skin last=bicolormiddle}
 
 \tcb@new@skin{bicolorlast}{base@last,%
@@ -606,30 +606,30 @@
   interior titled code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@pathlast}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@pathlast}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@UT%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@UT%
       \else%
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithtitle@pathlast}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithtitle@pathlast}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithtitle@pathlast}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithtitle@pathlast}%
     \fi\tcb@spec{}},
   interior code={%
     \iftcb@lowerseparated%
       \ifcase\tcbsegmentstate%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@pathlast}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@pathlast}%
       \or%
-      \tcb@spec{fill=tcbcol@back}\tcb@drawspec@US%
+      \tcb@spec{fill=tcbcolback}\tcb@drawspec@US%
       \else
-      {\tcbset{interior style={fill=tcbcol@backlower,segmentation@style}}\tcb@drawwithouttitle@pathlast}%
+      {\tcbset{interior style={fill=tcbcolbacklower,segmentation@style}}\tcb@drawwithouttitle@pathlast}%
       \fi%
     \else%
-      {\tcb@spec{fill=tcbcol@back}\tcb@drawwithouttitle@pathlast}%
+      {\tcb@spec{fill=tcbcolback}\tcb@drawwithouttitle@pathlast}%
     \fi\tcb@spec{}},%
   segmentation code={\iftcb@sidebyside%
-    \iftcb@hasTitle\tcb@drawspec@sbs@B{fill=tcbcol@backlower}\else%
-    \tcb@drawspec@sbs@F{fill=tcbcol@backlower}\fi\else\tcb@drawspec@LR{fill=tcbcol@backlower}\fi\tcb@spec{}},%
+    \iftcb@hasTitle\tcb@drawspec@sbs@B{fill=tcbcolbacklower}\else%
+    \tcb@drawspec@sbs@F{fill=tcbcolbacklower}\fi\else\tcb@drawspec@LR{fill=tcbcolbacklower}\fi\tcb@spec{}},%
   skin first=bicolormiddle,skin middle=bicolormiddle,skin last=bicolorlast}
 
 \tcb@new@skin{tile}{skin@bicolor,frame engine=empty,%
@@ -646,7 +646,7 @@
 \tcb@new@skin{tilelast}{skin@bicolorlast,frame engine=empty,%
   skin first=tilemiddle,skin middle=tilemiddle,skin last=tilelast}
 
-\tikzset{beamer@color/.style={fill=none,top color=tcbcol@back,bottom color=tcbcol@back!85!black}}
+\tikzset{beamer@color/.style={fill=none,top color=tcbcolback,bottom color=tcbcolback!85!black}}
 
 \tcb@new@skin{beamer}{base@unbroken,%
   frame engine=path,interior titled engine=empty,interior engine=empty,segmentation engine=empty,title engine=path,%
@@ -758,12 +758,12 @@
   \iftcb@sidebyside%
   \tcb@drawlower@path%
   \else%
-  \path[left color=tcbcol@frame!75!white,right color=tcbcol@frame!75!white!25!tcbcol@back,segmentation@style]
+  \path[left color=tcbcolframe!75!white,right color=tcbcolframe!75!white!25!tcbcolback,segmentation@style]
     ([yshift={-\kvtcb@middle/4}]segmentation.west) rectangle ([yshift={\kvtcb@middle/4}]segmentation.east);
   \fi%
 }
 
-\tikzset{widget@color/.style={left color=tcbcol@frame!75!white,right color=tcbcol@frame!75!white!25!tcbcol@back}}
+\tikzset{widget@color/.style={left color=tcbcolframe!75!white,right color=tcbcolframe!75!white!25!tcbcolback}}
 
 \tcb@new@skin{widget}{base@unbroken,%
   frame engine=path,interior titled engine=path,interior engine=path,segmentation engine=empty,title engine=empty,%
@@ -1037,11 +1037,11 @@
     code={\def\tcb@specialtitle@hook{%
       \ifx\tcbtitletext\@empty\else%
       \tcb@trans@set@boxedsize{#2}%
-      \colorlet{tcbtranscol@frame}{tcbcol@frame}%
-      \colorlet{tcbtranscol@back}{tcbcol@backtitle}%
+      \colorlet{tcbtranscol@frame}{tcbcolframe}%
+      \colorlet{tcbtranscol@back}{tcbcolbacktitle}%
       \let\tcb@trans@skin@current\kvtcb@skin@current%
       \let\tcb@trans@boxedstyle\kvtcb@style@boxedtitle%
-      \setbox\tcb@titlebox\color@hbox\bgroup\color{tcbcol@title}\kvtcb@fonttitle\kvtcb@before@boxedtitle\kvtcb@haligntitle\kvtcb@before@title\tcbtitletext\kvtcb@after@title\kvtcb@after@boxedtitle\egroup\color@endbox%
+      \setbox\tcb@titlebox\color@hbox\bgroup\color{tcbcoltitle}\kvtcb@fonttitle\kvtcb@before@boxedtitle\kvtcb@haligntitle\kvtcb@before@title\tcbtitletext\kvtcb@after@title\kvtcb@after@boxedtitle\egroup\color@endbox%
       \setbox\tcb@titlebox\color@hbox\tcbox[skin=\tcb@trans@skin@current,colframe=tcbtranscol@frame,colback=tcbtranscol@back,%
         code={\pgfkeysalsofrom\tcb@trans@boxedsize\pgfkeysalsofrom\tcb@trans@boxedstyle}]{\box\tcb@titlebox}\color@endbox%
       %
@@ -1348,8 +1348,8 @@
   enlarge top by=0mm,
   enlarge bottom by=0mm,
   width=\the\dimexpr\linewidth+1.6cm\relax,
-  frame style={top color=tcbcol@frame,bottom color=tcbcol@frame,middle color=yellow!75!tcbcol@frame},
-  title style={left color=tcbcol@frame,right color=tcbcol@frame,middle color=yellow!75!tcbcol@frame},
+  frame style={top color=tcbcolframe,bottom color=tcbcolframe,middle color=yellow!75!tcbcolframe},
+  title style={left color=tcbcolframe,right color=tcbcolframe,middle color=yellow!75!tcbcolframe},
   watermark tikz={\draw[line width=2mm] circle (1cm) node{\fontfamily{ptm}\fontseries{b}\fontsize{20mm}{20mm}\selectfont!};},
   watermark zoom=0.75,
 }}
@@ -1873,6 +1873,11 @@
   hyperurl*/.style 2 args={hyperurl* node={#1}{#2}{frame}},
   hyperurl* interior/.style 2 args={hyperurl* node={#1}{#2}{interior}},
   hyperurl* title/.style 2 args={hyperurl* node={#1}{#2}{title}},
+  beamer hidden/.style={nirvana},
+  beamer alerted/.style={fuzzy halo},
+  only/.code args={<#1>#2}{\only<#1>{\tcbset{#2}}},%
+  hide/.code args={<#1>}{\only<#1>{\tcbset{beamer hidden}}},%
+  alert/.code args={<#1>}{\only<#1>{\tcbset{beamer alerted}}},%
 }
 
 \tcbset{%
@@ -1881,7 +1886,7 @@
     colbacklower=black!15!white,%
     extend freelance=,extend freelancefirst=,extend freelancemiddle=,extend freelancelast=,%
     clear@spec,%
-    watermark opacity=1.00,watermark color=tcbcol@back!85!tcbcol@frame,%
+    watermark opacity=1.00,watermark color=tcbcolback!85!tcbcolframe,%
     watermark zoom=0.75,clip watermark,%
     clip title=false,clip upper=false,clip lower=false,%
     no borderline,smart shadow arc,no shadow,no underlay,no finish,tikz reset,at begin tikz reset,at end tikz reset,%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
index 3533b029f2c..0c2e5902d91 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbskinsjigsaw.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbskinsjigsaw.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{skins}
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
index a895a9b9d27..06ce9c04a5f 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbtheorems.code.tex: Code for theorems in colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{amsmath}
 
@@ -58,17 +58,17 @@
 
 \if@fleqn%
 \tcbset{%
-  ams equation upper/.style={before upper=\tcb@hack@amsmath\equation,after upper=\endequation},%
-  ams equation lower/.style={before lower=\tcb@hack@amsmath\equation,after lower=\endequation},%
-  ams equation* upper/.style={before upper=\tcb@hack@amsmath\csname equation*\endcsname,after upper=\endequation},%
-  ams equation* lower/.style={before lower=\tcb@hack@amsmath\csname equation*\endcsname,after lower=\endequation}%
+  ams equation upper/.style={before upper*=\tcb@hack@amsmath\equation,after upper*=\endequation},%
+  ams equation lower/.style={before lower*=\tcb@hack@amsmath\equation,after lower*=\endequation},%
+  ams equation* upper/.style={before upper*=\tcb@hack@amsmath\csname equation*\endcsname,after upper*=\endequation},%
+  ams equation* lower/.style={before lower*=\tcb@hack@amsmath\csname equation*\endcsname,after lower*=\endequation}%
 }%
 \else%
 \tcbset{%
-  ams equation upper/.style={before upper=\tcb@hack@currenvir\equation,after upper=\endequation},%
-  ams equation lower/.style={before lower=\tcb@hack@currenvir\equation,after lower=\endequation},%
-  ams equation* upper/.style={before upper=\tcb@hack@currenvir\csname equation*\endcsname,after upper=\endequation},%
-  ams equation* lower/.style={before lower=\tcb@hack@currenvir\csname equation*\endcsname,after lower=\endequation},%
+  ams equation upper/.style={before upper*=\tcb@hack@currenvir\equation,after upper*=\endequation},%
+  ams equation lower/.style={before lower*=\tcb@hack@currenvir\equation,after lower*=\endequation},%
+  ams equation* upper/.style={before upper*=\tcb@hack@currenvir\csname equation*\endcsname,after upper*=\endequation},%
+  ams equation* lower/.style={before lower*=\tcb@hack@currenvir\csname equation*\endcsname,after lower*=\endequation},%
 }%
 \fi
 
@@ -76,22 +76,22 @@
   theorem/.style args={#1#2#3#4}{%
     step and label={#2}{#4},%
     title={\letcs\tcb@temp{the#2}\tcb@theo@title{#1}{\tcb@temp}{#3}}},%
-  math upper/.style={before upper=$\displaystyle,after upper=$},%
-  math lower/.style={before lower=$\displaystyle,after lower=$},%
+  math upper/.style={before upper*=$\displaystyle,after upper*=$},%
+  math lower/.style={before lower*=$\displaystyle,after lower*=$},%
   math/.style={math upper,math lower},%
   ams equation/.style={ams equation upper,ams equation lower},%
   ams equation*/.style={ams equation* upper,ams equation* lower},%
-  ams align upper/.style={before upper=\tcb@hack@amsmath\align,after upper=\endalign},%
-  ams align lower/.style={before lower=\tcb@hack@amsmath\align,after lower=\endalign},%
+  ams align upper/.style={before upper*=\tcb@hack@amsmath\align,after upper*=\endalign},%
+  ams align lower/.style={before lower*=\tcb@hack@amsmath\align,after lower*=\endalign},%
   ams align/.style={ams align upper,ams align lower},%
-  ams align* upper/.style={before upper=\tcb@hack@amsmath\csname align*\endcsname,after upper=\endalign},%
-  ams align* lower/.style={before lower=\tcb@hack@amsmath\csname align*\endcsname,after lower=\endalign},%
+  ams align* upper/.style={before upper*=\tcb@hack@amsmath\csname align*\endcsname,after upper*=\endalign},%
+  ams align* lower/.style={before lower*=\tcb@hack@amsmath\csname align*\endcsname,after lower*=\endalign},%
   ams align*/.style={ams align* upper,ams align* lower},%
-  ams gather upper/.style={before upper=\tcb@hack@amsmath\gather,after upper=\endgather},%
-  ams gather lower/.style={before lower=\tcb@hack@amsmath\gather,after lower=\endgather},%
+  ams gather upper/.style={before upper*=\tcb@hack@amsmath\gather,after upper*=\endgather},%
+  ams gather lower/.style={before lower*=\tcb@hack@amsmath\gather,after lower*=\endgather},%
   ams gather/.style={ams gather upper,ams gather lower},%
-  ams gather* upper/.style={before upper=\tcb@hack@amsmath\csname gather*\endcsname,after upper=\endgather},%
-  ams gather* lower/.style={before lower=\tcb@hack@amsmath\csname gather*\endcsname,after lower=\endgather},%
+  ams gather* upper/.style={before upper*=\tcb@hack@amsmath\csname gather*\endcsname,after upper*=\endgather},%
+  ams gather* lower/.style={before lower*=\tcb@hack@amsmath\csname gather*\endcsname,after lower*=\endgather},%
   ams gather*/.style={ams gather* upper,ams gather* lower},%
   ams nodisplayskip upper/.style={before upper=\vskip-\abovedisplayskip},%
   ams nodisplayskip lower/.style={before lower=\vskip-\abovedisplayskip},%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
index 95a00bbd877..0f494da1dd5 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbvignette.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbvignette.code.tex: Code for ornamental frames
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -17,7 +17,7 @@
 %%
 %% This work consists of all files listed in README
 %%
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \tcbuselibrary{skins}
 
@@ -280,7 +280,7 @@
 %
   underlay@vignette/.style 2 args={underlay #1={%
     \begin{tcbclipframe}\tcbvignette{%
-      raised color=tcbcol@frame,
+      raised color=tcbcolframe,
       north size=\kvtcb@top@rule@stand,
       south size=\kvtcb@bottom@rule@stand,
       west size=\kvtcb@left@rule,
@@ -310,11 +310,11 @@
   %
   underlay raised shading vignette/.style={%
     underlay vignette={draw method=clipped,
-      north style={bottom color=tcbcol@frame,top color=tcbcol@frame!33!white},
-      east style={left color=tcbcol@frame,right color=tcbcol@frame!66!black},
-      south style={top color=tcbcol@frame,bottom color=tcbcol@frame!33!black},
-      west style={right color=tcbcol@frame,left color=tcbcol@frame!66!white},#1}},
+      north style={bottom color=tcbcolframe,top color=tcbcolframe!33!white},
+      east style={left color=tcbcolframe,right color=tcbcolframe!66!black},
+      south style={top color=tcbcolframe,bottom color=tcbcolframe!33!black},
+      west style={right color=tcbcolframe,left color=tcbcolframe!66!white},#1}},
   %
   underlay shade in vignette/.style={%
-    underlay vignette={draw method=clipped,color from=tcbcol@back to tcbcol@frame,#1}},
+    underlay vignette={draw method=clipped,color from=tcbcolback to tcbcolframe,#1}},
 }
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex
index 6ee56dc361d..be04cd80285 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbxparse.code.tex
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcbxparse.code.tex: Code for xparse features
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 %\makeatletter
-\tcb@set@library@version{4.15}
+\tcb@set@library@version{4.20}
 
 \RequirePackage{xparse}[2013/12/31]
 
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
index caa102b9f6f..778bf123638 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
@@ -1,8 +1,8 @@
-%% The LaTeX package tcolorbox - version 4.15 (2018/12/07)
+%% The LaTeX package tcolorbox - version 4.20 (2019/03/02)
 %% tcolorbox.sty: Text color boxes
 %%
 %% -------------------------------------------------------------------------------------------
-%% Copyright (c) 2006-2018 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% Copyright (c) 2006-2019 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
 %% -------------------------------------------------------------------------------------------
 %%
 %% This work may be distributed and/or modified under the
@@ -18,8 +18,8 @@
 %% This work consists of all files listed in README
 %%
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{tcolorbox}[2018/12/07 version 4.15 text color boxes]
-\def\tcb@version{4.15}
+\ProvidesPackage{tcolorbox}[2019/03/02 version 4.20 text color boxes]
+\def\tcb@version{4.20}
 
 \RequirePackage{pgf}[2008/01/15]
 \RequirePackage{verbatim}[2003/08/22]
@@ -30,6 +30,7 @@
 \newif\iftcb@lowerignored
 \newif\iftcb@lowervisible
 \newif\iftcb@uppervisible
+\newif\iftcb@titlevisible
 \newif\iftcb@hasTitle
 \newif\iftcb@hasLower
 \newif\iftcb@lowerspace
@@ -129,7 +130,7 @@
 \pgfkeys{/handlers/.colorlet/.code=\pgfkeysalso{\pgfkeyscurrentpath/.code=\colorlet{#1}{##1}}}
 
 \newcommand\tcbtitle{\ifx\tcbtitletext\@empty\else%
-  \leavevmode{\color{tcbcol@title}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\tcbtitletext\kvtcb@after@title}\fi}
+  \leavevmode{\color{tcbcoltitle}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\tcbtitletext\kvtcb@after@title}\fi}
 
 \def\tcb@detach@title@code@{%
   \let\tcbtitletext\kvtcb@title%
@@ -164,6 +165,15 @@
 \def\tcb@raggedleft@plain{\raggedleft\leftskip0pt plus2em \spaceskip.3333em \xspaceskip.5em \hbadness=10000\relax}
 \def\tcb@raggedcenter@plain{\centering\leftskip0pt plus2em\rightskip0pt plus2em\spaceskip.3333em \xspaceskip.5em \hbadness=10000\relax}
 
+\def\tcb@insert@before@upper@ignore{\kvtcb@before@upper\ignorespaces}
+\def\tcb@insert@before@upper@noignore{\kvtcb@before@upper}
+\def\tcb@insert@before@lower@ignore{\kvtcb@before@lower\ignorespaces}
+\def\tcb@insert@before@lower@noignore{\kvtcb@before@lower}
+\def\tcb@insert@after@upper@unskip{\ifvmode\else\unskip\fi\kvtcb@after@upper}
+\def\tcb@insert@after@upper@nounskip{\kvtcb@after@upper}
+\def\tcb@insert@after@lower@unskip{\ifvmode\else\unskip\fi\kvtcb@after@lower}
+\def\tcb@insert@after@lower@nounskip{\kvtcb@after@lower}
+
 \tcbset{%
   title/.store in=\kvtcb@title,
   notitle/.style={title=},
@@ -247,12 +257,12 @@
   bottom/.store in=\kvtcb@bottom,
   bottomtitle/.store in=\kvtcb@bottomtitle,
   middle/.store in=\kvtcb@middle,
-  colback/.colorlet=tcbcol@back,
-  colframe/.colorlet=tcbcol@frame,
-  colupper/.colorlet=tcbcol@upper,
-  collower/.colorlet=tcbcol@lower,
+  colback/.colorlet=tcbcolback,
+  colframe/.colorlet=tcbcolframe,
+  colupper/.colorlet=tcbcolupper,
+  collower/.colorlet=tcbcollower,
   coltext/.style={colupper=#1,collower=#1},
-  coltitle/.colorlet=tcbcol@title,
+  coltitle/.colorlet=tcbcoltitle,
   fonttitle/.store in=\kvtcb@fonttitle,
   fontupper/.store in=\kvtcb@fontupper,
   fontlower/.store in=\kvtcb@fontlower,
@@ -310,8 +320,11 @@
   upperbox/.is choice,
   upperbox/visible/.code={\tcb@uppervisibletrue},
   upperbox/invisible/.code={\tcb@uppervisiblefalse},
-  visible/.style={upperbox=visible,lowerbox=visible},
-  invisible/.style={upperbox=invisible,lowerbox=invisible},
+  titlebox/.is choice,
+  titlebox/visible/.code={\tcb@titlevisibletrue},
+  titlebox/invisible/.code={\tcb@titlevisiblefalse},
+  visible/.style={upperbox=visible,lowerbox=visible,titlebox=visible},
+  invisible/.style={upperbox=invisible,lowerbox=invisible,titlebox=invisible},
   natural height/.code={\tcb@fixedheightfalse\tcb@@ch@@operation{\tcb@ch@natural}},
   height/.code={\tcb@fixedheighttrue\tcb@dim@to\kvtcb@height@fixed{#1}\tcb@@ch@@operation{\tcb@ch@fixed}},
   text height/.code={\tcb@fixedheighttrue\tcb@dim@to\kvtcb@height@fixed{#1}\tcb@@ch@@operation{\tcb@ch@innerfixed}},
@@ -543,12 +556,14 @@
   standard jigsaw/.style={skin=standard jigsaw},%
   before title/.store in=\kvtcb@before@title,%
   after title/.store in=\kvtcb@after@title,%
-  before upper/.store in=\kvtcb@before@upper,%
-  after upper/.store in=\kvtcb@after@upper,%
-  after upper*/.style={after upper={#1}},%
-  before lower/.store in=\kvtcb@before@lower,%
-  after lower/.store in=\kvtcb@after@lower,%
-  after lower*/.style={after lower={#1}},%
+  before upper/.code={\def\kvtcb@before@upper{#1}\let\tcb@insert@before@upper\tcb@insert@before@upper@ignore},%
+  before upper*/.code={\def\kvtcb@before@upper{#1}\let\tcb@insert@before@upper\tcb@insert@before@upper@noignore},%
+  after upper/.code={\def\kvtcb@after@upper{#1}\let\tcb@insert@after@upper\tcb@insert@after@upper@unskip},%
+  after upper*/.code={\def\kvtcb@after@upper{#1}\let\tcb@insert@after@upper\tcb@insert@after@upper@nounskip},%
+  before lower/.code={\def\kvtcb@before@lower{#1}\let\tcb@insert@before@lower\tcb@insert@before@lower@ignore},%
+  before lower*/.code={\def\kvtcb@before@lower{#1}\let\tcb@insert@before@lower\tcb@insert@before@lower@noignore},%
+  after lower/.code={\def\kvtcb@after@lower{#1}\let\tcb@insert@after@lower\tcb@insert@after@lower@unskip},%
+  after lower*/.code={\def\kvtcb@after@lower{#1}\let\tcb@insert@after@lower\tcb@insert@after@lower@nounskip},%
   center title/.style={halign title=flush center},%
   center upper/.style={halign upper=flush center},%
   center lower/.style={halign lower=flush center},%
@@ -561,12 +576,12 @@
   tabularx*/.style 2 args={%
     boxsep=\z@,top=\z@,bottom=\z@,leftupper=\z@,rightupper=\z@,
     toptitle=1mm,bottomtitle=1mm,boxrule=0.5mm,
-    before upper={\arrayrulecolor{tcbcol@frame}\def\arraystretch{1.1}#1%
+    before upper*={\arrayrulecolor{tcbcolframe}\def\arraystretch{1.1}#1%
       \tcb@hack@currenvir\tabularx{\linewidth}{#2}},
-    after upper=\endtabularx\arrayrulecolor{black}},
+    after upper*=\endtabularx\arrayrulecolor{black}},
   tabularx/.style={tabularx*={}{#1}},
-  tikz upper/.style={before upper={\centering\tcb@shield@externalize\begin{tikzpicture}[{#1}]},after upper=\end{tikzpicture}},%
-  tikz lower/.style={before lower={\centering\tcb@shield@externalize\begin{tikzpicture}[{#1}]},after lower=\end{tikzpicture}},%
+  tikz upper/.style={before upper*={\centering\tcb@shield@externalize\begin{tikzpicture}[{#1}]},after upper*=\end{tikzpicture}},%
+  tikz lower/.style={before lower*={\centering\tcb@shield@externalize\begin{tikzpicture}[{#1}]},after lower*=\end{tikzpicture}},%
   tikznode upper/.style={before upper={\centering\tcb@shield@externalize\begin{tikzpicture}\node[{align=center,inner sep=\z@,outer sep=\z@,#1}]\bgroup},after upper={\egroup;\end{tikzpicture}}},%
   tikznode lower/.style={before lower={\centering\tcb@shield@externalize\begin{tikzpicture}\node[{align=center,inner sep=\z@,outer sep=\z@,#1}]\bgroup},after lower={\egroup;\end{tikzpicture}}},%
   tikznode/.style={tikznode upper={#1},tikznode lower={#1}},%
@@ -627,6 +642,7 @@
   hbox/.style={capture=hbox},%
   minipage/.style={capture=minipage},%
   void/.style={capture=v@@d,capture/.code=,options@for/.code=,code={\def\tcbinputlisting@core{}}},
+  nirvana/.code={\let\tcb@draw@color@box\@empty},
   check odd page/.is if=tcb@checkpage,
   if odd page/.code 2 args={%
     \tcbset{check odd page}%
@@ -666,7 +682,7 @@
   list entry/.store in=\kvtcb@listentry,
   list text/.style={list entry={\protect\numberline{\thetcbcounter}{\ignorespaces #1}}},
   title filled/.is if=tcb@titlefilled,%
-  @colbacktitle/.colorlet=tcbcol@backtitle,
+  @colbacktitle/.colorlet=tcbcolbacktitle,
   colbacktitle/.style={title filled,@colbacktitle={#1}},
   opacityupper/.store in=\kvtcb@opacityupper,
   opacitylower/.store in=\kvtcb@opacitylower,
@@ -695,7 +711,6 @@
   on line/.style={tcbox raise base,nobeforeafter},
   shape@of@skin/.store in=\tcb@shapeofskin,
   ignore nobreak/.is if=tcb@ignorenobreak,%
-  only/.code args={<#1>#2}{\only<#1>{\tcbset{#2}}},%
   %
   tcbox width/.is choice,
   tcbox width/auto/.code={\def\tcb@embed@tcbox{}},
@@ -778,10 +793,10 @@
 \let\endtcb@savebox=\endtcb@lrbox
 
 \def\tcb@saveupperbox{%
-\begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\kvtcb@fontupper\kvtcb@halignupper\kvtcb@before@upper\ignorespaces}
+\begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper}
 
 \def\tcb@savelowerbox{%
-\begin{tcb@savebox}{\tcb@lowerbox}{\tcb@w@lower}\kvtcb@fontlower\kvtcb@halignlower\kvtcb@before@lower\ignorespaces}
+\begin{tcb@savebox}{\tcb@lowerbox}{\tcb@w@lower}\kvtcb@fontlower\kvtcb@halignlower\tcb@insert@before@lower}
 
 
 % counter for float
@@ -816,7 +831,7 @@
   \ifx\kvtcb@title\@empty\tcb@hasTitlefalse\tcb@specialtitle@hook\else%
     \tcb@hasTitletrue%
     \tcbdimto\tcb@w@title{\kvtcb@width-(\kvtcb@left@rule+\kvtcb@right@rule+(\kvtcb@boxsep)*2+\kvtcb@lefttitle+\kvtcb@righttitle)}%
-    \begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}\color{tcbcol@title}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\kvtcb@title\kvtcb@after@title\end{tcb@savebox}%
+    \begin{tcb@savebox}{\tcb@titlebox}{\tcb@w@title}\color{tcbcoltitle}\kvtcb@fonttitle\kvtcb@haligntitle\kvtcb@before@title\kvtcb@title\kvtcb@after@title\end{tcb@savebox}%
   \fi%
 }
 
@@ -886,17 +901,17 @@
 
 \def\tcb@set@@upper@and@lower{%
   \colorlet{tcbcol@origin}{.}%
-  \let\tcb@after@box=\kvtcb@after@upper%
+  \let\tcb@insert@after@part=\tcb@insert@after@upper%
   % switch for lower box
   \def\tcblower{%
-    \ifvmode\else\unskip\fi\tcb@after@box%
+    \tcb@insert@after@part%
     \end{tcb@savebox}%
-    \tcb@set@color{tcbcol@lower}%
+    \tcb@set@color{tcbcollower}%
     \unless\iftcb@sidebyside%
       \tcbdimto\tcb@w@lower{\tcb@innerwidth-\kvtcb@boxsep*2-\kvtcb@leftlower-\kvtcb@rightlower}%
     \fi%
     \tcb@hasLowertrue%
-    \let\tcb@after@box=\kvtcb@after@lower%
+    \let\tcb@insert@after@part=\tcb@insert@after@lower%
     \ifx\kvtcb@savelowerto\@empty%
       \let\tcb@startbox\tcb@savelowerbox%
       \let\endtcolorbox\tcb@endboxanddraw%
@@ -906,7 +921,7 @@
     \fi%
     \tcb@startbox}%
   % start of upper box
-  \tcb@set@color{tcbcol@upper}%
+  \tcb@set@color{tcbcolupper}%
   \ifx\kvtcb@saveupperto\@empty%
     \let\tcb@startbox\tcb@saveupperbox%
     \let\endtcolorbox\tcb@endboxanddraw%
@@ -1089,7 +1104,7 @@
 \let\tcolorbox\tcb@colorbox
 
 \def\tcb@endboxanddraw{%
-  \ifvmode\else\unskip\fi\tcb@after@box%
+  \tcb@insert@after@part%
   \end{tcb@savebox}%
   \tcb@reset@color%
   \tcb@draw@color@box%
@@ -1399,7 +1414,7 @@
 \def\tcb@drawframe@standard{%
   \begin{pgfscope}%
   \tcb@boundaryframe@standard%
-  \pgfsetfillcolor{tcbcol@frame}%
+  \pgfsetfillcolor{tcbcolframe}%
   \pgfsetfillopacity{\kvtcb@opacityframe}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -1409,7 +1424,7 @@
 \def\tcb@drawframe@standardjigsaw{%
   \begin{pgfscope}%
   \tcb@boundaryframe@standardjigsaw%
-  \pgfsetfillcolor{tcbcol@frame}%
+  \pgfsetfillcolor{tcbcolframe}%
   \pgfsetfillopacity{\kvtcb@opacityframe}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -1419,7 +1434,7 @@
 \def\tcb@drawwithtitle@standard{%
   \begin{pgfscope}%
   \tcb@boundaryinterior@title@standard%
-  \pgfsetfillcolor{tcbcol@back}%
+  \pgfsetfillcolor{tcbcolback}%
   \pgfsetfillopacity{\kvtcb@opacityback}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -1429,7 +1444,7 @@
 \def\tcb@drawwithouttitle@standard{%
   \begin{pgfscope}%
   \tcb@boundaryinterior@notitle@standard%
-  \pgfsetfillcolor{tcbcol@back}%
+  \pgfsetfillcolor{tcbcolback}%
   \pgfsetfillopacity{\kvtcb@opacityback}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -1439,7 +1454,7 @@
 \def\tcb@drawtitle@standard{%
   \begin{pgfscope}%
   \tcb@boundarytitle@standard%
-  \pgfsetfillcolor{tcbcol@backtitle}%
+  \pgfsetfillcolor{tcbcolbacktitle}%
   \pgfsetfillopacity{\kvtcb@opacitybacktitle}%
   \pgfusepath{fill}%
   \end{pgfscope}%
@@ -1458,7 +1473,7 @@
   \pgfpathmoveto{\pgfqpoint{\kvtcb@left@rule}{\tcb@seg@pos}}%
   \pgfpathlineto{\pgfqpoint{\the\dimexpr\tcb@width-\kvtcb@right@rule\relax}{\tcb@seg@pos}}%
   \fi%
-  \pgfsetcolor{tcbcol@frame}%
+  \pgfsetcolor{tcbcolframe}%
   \pgfsetstrokeopacity{\kvtcb@opacityframe}%
   \pgfusepath{stroke}%
   \end{pgfscope}%
@@ -1513,14 +1528,14 @@
 }
 
 \def\tcb@tdraw@title@core{%
-  \iftcb@hasTitle%
+  \iftcb@hasTitle\iftcb@titlevisible%%
     \begin{pgfscope}%
     \pgfsetfillopacity{\kvtcb@opacitytitle}%
     \pgftext[x=\the\dimexpr\kvtcb@left@rule+\kvtcb@boxsep+\kvtcb@lefttitle\relax,
              y=\the\dimexpr\tcb@height-\kvtcb@top@rule-\kvtcb@boxsep-\kvtcb@toptitle\relax,
-             left,top]{\color{tcbcol@title}\box\tcb@titlebox}%
+             left,top]{\color{tcbcoltitle}\box\tcb@titlebox}%
     \end{pgfscope}%
-  \fi%
+  \fi\fi%
 }
 \let\tcb@tdraw@title=\tcb@tdraw@title@core
 
@@ -1530,7 +1545,7 @@
     \pgfsetfillopacity{\kvtcb@opacityupper}%
     \csname tcb@dbox@\kvtcb@valignupper\endcsname{\the\dimexpr\kvtcb@left@rule+\kvtcb@boxsep+\kvtcb@leftupper\relax}%
             {\the\dimexpr\tcb@innerheight+\kvtcb@bottom@rule-\kvtcb@boxsep-\tcb@break@topsep-\kvtcb@top-\tcb@height@upper\relax}%
-            {\tcb@height@upper}{\tcb@upperbox}{tcbcol@upper}%
+            {\tcb@height@upper}{\tcb@upperbox}{tcbcolupper}%
     \end{pgfscope}%
   \fi%
 }
@@ -1542,7 +1557,7 @@
     \pgfsetfillopacity{\kvtcb@opacitylower}%
     \csname tcb@dbox@\kvtcb@valignlower\endcsname{\the\dimexpr\kvtcb@left@rule+\kvtcb@boxsep+\kvtcb@leftlower\relax}%
             {\the\dimexpr\kvtcb@bottom@rule+\kvtcb@boxsep+\tcb@break@bottomsep+\kvtcb@bottom\relax}%
-            {\tcb@height@lower}{\tcb@lowerbox}{tcbcol@lower}%
+            {\tcb@height@lower}{\tcb@lowerbox}{tcbcollower}%
     \end{pgfscope}%
   \fi%
 }
@@ -1573,7 +1588,7 @@
     \fi%
     \iftcb@hasLower%
       \tcb@box@align{\tcb@lowerbox}%
-      \iftcb@lowervisible\leavevmode\color{tcbcol@lower}\unhbox\tcb@lowerbox%
+      \iftcb@lowervisible\leavevmode\color{tcbcollower}\unhbox\tcb@lowerbox%
       \else%
         \iftcb@lowerignored\else\rule[-\dp\tcb@lowerbox]{\z@}{\the\dimexpr\ht\tcb@lowerbox+\dp\tcb@lowerbox\relax}\fi%
       \fi%
@@ -1716,8 +1731,8 @@
   \tcbset{breakable@false,sidebyside=false}%
   \tcb@set@@phantom%
   \colorlet{tcbcol@origin}{.}%
-  \tcb@set@color{tcbcol@upper}%
-  \sbox\tcb@upperbox{\tcb@embed@tcbox{\kvtcb@fontupper\kvtcb@halignupper\kvtcb@before@upper\ignorespaces#1\ifvmode\else\unskip\fi\kvtcb@after@upper}}%
+  \tcb@set@color{tcbcolupper}%
+  \sbox\tcb@upperbox{\tcb@embed@tcbox{\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper}}%
   \tcb@reset@color%
   \tcbdimto\tcb@val@raisebase{\the\dimexpr\dp\tcb@upperbox+\kvtcb@bottom+\kvtcb@boxsep+\kvtcb@bottom@rule@stand+\kvtcb@bbbottom@stand\relax}%
   \tcbdimto\kvtcb@width{\wd\tcb@upperbox+\kvtcb@left@rule+\kvtcb@leftupper+\kvtcb@boxsep*2+\kvtcb@rightupper+\kvtcb@right@rule}%
@@ -1734,8 +1749,8 @@
   \tcb@set@@title%
   \tcb@set@@dimensions%
   \colorlet{tcbcol@origin}{.}%
-  \tcb@set@color{tcbcol@upper}%
-  \begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\kvtcb@fontupper\kvtcb@halignupper\kvtcb@before@upper\ignorespaces#1\ifvmode\else\unskip\fi\kvtcb@after@upper\end{tcb@savebox}%
+  \tcb@set@color{tcbcolupper}%
+  \begin{tcb@savebox}{\tcb@upperbox}{\tcb@w@upper}\kvtcb@fontupper\kvtcb@halignupper\tcb@insert@before@upper#1\tcb@insert@after@upper\end{tcb@savebox}%
   \tcb@reset@color%
   \tcb@hasLowerfalse%
   \tcb@draw@color@box%
@@ -1758,13 +1773,13 @@
 
 \newcommand{\tcbsubtitle}[2][]{%
   \begingroup%
-  \colorlet{tcbtranscol@frame}{tcbcol@frame}%
+  \colorlet{tcbtranscol@frame}{tcbcolframe}%
   \iftcb@titlefilled%
-    \colorlet{tcbtranscol@back}{tcbcol@backtitle}%
+    \colorlet{tcbtranscol@back}{tcbcolbacktitle}%
   \else%
-    \colorlet{tcbtranscol@back}{tcbcol@frame}%
+    \colorlet{tcbtranscol@back}{tcbcolframe}%
   \fi%
-  \colorlet{tcbtranscol@upper}{tcbcol@title}%
+  \colorlet{tcbtranscol@upper}{tcbcoltitle}%
   \let\tcb@trans@fontupper\kvtcb@fonttitle%
   \let\tcb@trans@boxsep\kvtcb@boxsep%
   \let\tcb@trans@left\kvtcb@leftupper%
@@ -2112,7 +2127,7 @@
     size=normal,rounded corners,parfillskip restore,
     enlarge top by=0mm,enlarge bottom by=0mm,enlarge left by=0mm,enlarge right by=0mm,
     toggle enlargement=none,toggle left and right=none,
-    baseline=0pt,adjust text={\"Apgjy},upperbox=visible,lowerbox=visible,lower separated,
+    baseline=0pt,adjust text={\"Apgjy},upperbox=visible,lowerbox=visible,titlebox=visible,lower separated,
     colback=black!5!white,colframe=black!75!white,@colbacktitle=black!50!white,coltext=black,coltitle=white,
     fonttitle=,fontupper=,fontlower=,floatplacement=htb,nofloat,saveto=,savelowerto=,
     tempfile={\jobname.tcbtemp},