tcolorbox (23apr13)

git-svn-id: svn://tug.org/texlive/trunk@30073 c570f23f-e606-0410-a88d-b1316a301751

19 files changed, 524 insertions, 237 deletions

diff --git a/Master/texmf-dist/doc/latex/tcolorbox/CHANGES b/Master/texmf-dist/doc/latex/tcolorbox/CHANGES
index 6b21d50de24..25247eec8f2 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/CHANGES
+++ b/Master/texmf-dist/doc/latex/tcolorbox/CHANGES
@@ -1,188 +1,195 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)

-%%

-%% -------------------------------------------------------------------------------------------

-%% Copyright (c) 2006-2012 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>

-%% -------------------------------------------------------------------------------------------

-%%

-%% This work may be distributed and/or modified under the

-%% conditions of the LaTeX Project Public License, either version 1.3

-%% of this license or (at your option) any later version.

-%% The latest version of this license is in

-%%   http://www.latex-project.org/lppl.txt

-%% and version 1.3 or later is part of all distributions of LaTeX

-%% version 2005/12/01 or later.

-%%

-%% This work has the LPPL maintenance status `author-maintained'.

-%%

-%% This work consists of all files listed in README

-%%

-

-(2006-2011): pre publication usage

-

-version 1.00 (2011/12/08): initial public release

-

-version 1.01 (2012/01/26):

-- dates amended to \RequirePackage(s)

-- provision of the tcolorbox.tds.zip file for easier installation

-

-version 1.02 (2012/02/15)

-- documentation language changed from German to English

-- small correction of the theorem title line appearance

-

-version 1.10 (2012/03/01)

-- tcblatex style for listings changed (nolol added)

-- improved hyperref support

-- new keys parskip and noparskip

-- source code of the documentation added

-- new library 'documentation' to support LaTeX documentations

-  with several library commands, environments and keys (see documentation)

-

-version 1.20 (2012/03/16)

-- new geometry keys:

-  'lefttitle', 'leftupper', 'leftlower', 'righttitle', 'rightupper', 'rightlower'

-  and implementation changed for 'left' and 'right'

-- implementation for tcolorbox changed (adaption to height options)

-- new fixed height option keys:

-  'natural height', 'height', 'equal height group', 'minimum for equal height group',

-  'space', 'space to upper', 'space to lower', 'space to both', 'split',

-  'valign', 'valign lower',

-  'adjusted title'

-- new bounding box option keys:

-  'enlarge top by', 'enlarge bottom by', 'enlarge left by', 'enlarge right by',

-  'toggle enlargement'

-- preparations for a future skin changing option implemented

-- commands \brackets and \docAuxCommand added to the documentation library

-- documentation rearranged

-

-version 1.30 (2012/04/20)

-- several internal code changes to provide a 'skin' exchange mechanism

-- new keys for the core package:

-  'frame engine', 'interior titled engine', 'interior engine', 'segmentation engine'

-  'skin', 'graphical environment', 'geometry nodes', 'colupper', 'collower'

-- tcolorbox now defined as 'long' macro

-- new keys for the library 'listings':

-  'comment', 'listing and comment', 'comment and listing'

-- new library 'skins' with the skins

-  'standard', 'enhanced', 'freelance', 'bicolor', 'beamer', 'widget'

-- keys for the library 'skins':

-  'frame style', 'interior style', 'segmentation style'

-  'frame code', 'interior titled code', 'interior code', 'segmentation code',

-  'colbacklower'

-

-version 2.00 (2013/03/01)

-- breaking news: the new library 'breakable' adds breaking support to tcolorbox.

-- e-TeX now used instead of calc

-- new key 'adjust text' and new implementation for 'adjusted title'

-- new geometry keys:

-  'toprule', 'toprule at break', 'bottomrule', 'bottomrule at break',

-  'leftrule', 'rightrule', 'titlerule', 'outer arc', 'auto outer arc',

-  'toptitle', 'bottomtitle'

-- new bounding box keys:

-  'enlarge top at break by', 'enlarge bottom at break by'

-- new overlay keys:

-  'overlay', 'no overlay', 'overlay broken', 'overlay unbroken',

-  'overlay first', 'overlay middle', 'overlay last',

-  'overlay unbroken and first', 'overlay middle and last'

-- new key: 'parbox' to change text behaviour

-- new library 'breakable' for breakable boxes with the new keys:

-  'breakable', 'unbreakable', 'title after break', 'notitle after break',

-  'adjusted title after break', 'lines before break', 'shrink break goal'

-- new keys for the 'skins' library

-  'skin first', 'skin middle', 'skin last', 'title engine', 'pathfirst',

-  'pathmiddle', 'pathlast', 'title style', 'title code', 'enhancedfirst',

-  'enhancedmiddle', 'enhancedlast', 'enhanced', 'marker', 'bicolor',

-  'bicolorfirst', 'bicolormiddle', 'bicolorlast', 'beamer',

-  'beamerfirst', 'beamermiddle', 'beamerlast', 'draft', 'freelance', 'standard'

-- NOTE: skins 'beamer' and 'widget' changed

-  use the new style options 'beamer' and 'widget' to get the old appearance

-- new watermark keys:

-  'watermark text', 'watermark text on', 'watermark graphics',

-  'watermark graphics on', 'watermark tikz', 'watermark tikz on',

-  'no watermark', 'watermark opacity', 'watermark color',

-  'watermark zoom', 'watermark stretch'

-

-version 2.01 (2013/03/07)

-- bug fix: superfluous vertical space for a breakable box which appeared after a page break

-- bug fix: height computation error when a broken boxed starts with a segmentation line

-- new key for the 'listings' library:

-  'listing inputencoding'

-- new library 'listingsutf8' as variant of 'listings' with new key

-  'listing utf8'

-- keys 'toprule at break', 'bottomrule at break',

-  'enlarge top at break by', 'enlarge bottom at break by'

-  moved from core package to 'breakable' library.

-- new keys for the 'breakable' library:

-  'topsep at break', 'bottomsep at break', 'pad before break',

-  'pad after break', 'pad at break'

-

-version 2.02 (2013/03/13)

-- minor bug fix: segmentation line of 'enhanced' now matches 'standard'

-- new macro '\tcbox' to draw a colorbox fitted to the content width

-- new key 'autoparskip' to detect usage of package parskip automatically

-- new key 'nobeforeafter'

-- new macro '\tcbline' in the 'skins' library to draw 'just lines'

-- new key 'colbacktitle' for the 'skins' library

-

-version 2.10 (2013/04/09)

-- bug fix: \tcbox ignored font settings

-- outdated documentation in German removed from package

-- new core package keys:

-  'oversize', 'tcbox raise', 'tcbox raise base',

-  'before title', 'after title', 'before upper', 'after upper', 'before lower',

-  'after lower', 'center title', 'center upper', 'center lower',

-  'tabularx*', 'tabularx', 'tikz upper', 'tikz lower',

-  'shrink tight', 'extrude left by', 'extrude right by', 'extrude top by',

-  'extrude bottom by', 'extrude by'

-- the 'theorems' library now loads 'amsmath'

-- new macros for the 'theorems' library:

-  '\tcboxmath', '\tcbhighmath'

-- new keys for the 'theorems' library:

-  'math upper', 'math lower', 'math', 'highlight math', 'highlight math style',

-  'ams equation upper', 'ams equation lower', 'ams equation', 'ams equation* upper',

-  'ams equation* lower', 'ams equation*', 'ams align upper', 'ams align lower',

-  'ams align', 'ams align* upper', 'ams align* lower', 'ams align*',

-  'ams gather upper', 'ams gather lower', 'ams gather', 'ams gather* upper',

-  'ams gather* lower', 'ams gather*',

-  'ams nodisplayskip upper', 'ams nodisplayskip lower', 'ams nodisplayskip'

-- new library 'hooks' for hook options with the new keys:

-  'before upper app', 'before upper pre', 'after upper app', 'after upper pre',

-  'before lower app', 'before lower pre', 'after lower app', 'after lower pre',

-  'before title app', 'before title pre', 'after title app', 'after title pre',

-  'before app', 'before pre', 'after app', 'after pre',

-  'overlay unbroken app', 'overlay unbroken pre', 'overlay first app', 'overlay first pre',

-  'overlay middle app', 'overlay middle pre', 'overlay last app', 'overlay last pre',

-  'overlay app', 'overlay pre', 'overlay broken app', 'overlay broken pre',

-  'overlay unbroken and first app', 'overlay unbroken and first pre',

-  'overlay middle and last app', 'overlay middle and last pre',

-  'watermark tikz app', 'watermark tikz pre', 'watermark tikz app on', 'watermark tikz pre on',

-  'watermark graphics app', 'watermark graphics pre', 'watermark graphics app on', 'watermark graphics pre on',

-  'watermark text app', 'watermark text pre', 'watermark text app on', 'watermark text pre on',

-  'frame code app', 'frame code pre', 'interior titled code app', 'interior titled code pre',

-  'interior code app', 'interior code pre', 'segmentation code app', 'segmentation code pre',

-  'title code app', 'title code pre'

-- colorization of source code snippets in the documentation

-

-version 2.20 (2013/04/17)

-- bug fix: problem with breaking boxes after headings

-- new feature: support for boxes with side by side content

-- new keys:

-  'sidebyside', 'sidebyside align', 'sidebyside gap',

-  'lefthand width', 'righthand width', 'lefthand ratio', 'righthand ratio'

-- key 'nofloat' documented

-- new keys for the 'listings' library:

-  'listing side text', 'text side listing'

-  'listing outside text', 'text outside listing'

-- new keys for the 'skins' library:

-  'frame hidden', 'interior hidden', 'segmentation hidden', 'title hidden'

-- new environments for the 'documentation' library:

-  'dispExample*', 'dispListing*'

-- the default style for 'highlight math' is changed to have no title

-- minor change of internal width computation

-- minor internal fixes

-- slight overhaul of the documentation

-

-

-

-

-

-

+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
+%%
+%% -------------------------------------------------------------------------------------------
+%% Copyright (c) 2006-2013 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
+%% -------------------------------------------------------------------------------------------
+%%
+%% This work may be distributed and/or modified under the
+%% conditions of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%% The latest version of this license is in
+%%   http://www.latex-project.org/lppl.txt
+%% and version 1.3 or later is part of all distributions of LaTeX
+%% version 2005/12/01 or later.
+%%
+%% This work has the LPPL maintenance status `author-maintained'.
+%%
+%% This work consists of all files listed in README
+%%
+
+(2006-2011): pre publication usage
+
+version 1.00 (2011/12/08): initial public release
+
+version 1.01 (2012/01/26):
+- dates amended to \RequirePackage(s)
+- provision of the tcolorbox.tds.zip file for easier installation
+
+version 1.02 (2012/02/15)
+- documentation language changed from German to English
+- small correction of the theorem title line appearance
+
+version 1.10 (2012/03/01)
+- tcblatex style for listings changed (nolol added)
+- improved hyperref support
+- new keys parskip and noparskip
+- source code of the documentation added
+- new library 'documentation' to support LaTeX documentations
+  with several library commands, environments and keys (see documentation)
+
+version 1.20 (2012/03/16)
+- new geometry keys:
+  'lefttitle', 'leftupper', 'leftlower', 'righttitle', 'rightupper', 'rightlower'
+  and implementation changed for 'left' and 'right'
+- implementation for tcolorbox changed (adaption to height options)
+- new fixed height option keys:
+  'natural height', 'height', 'equal height group', 'minimum for equal height group',
+  'space', 'space to upper', 'space to lower', 'space to both', 'split',
+  'valign', 'valign lower',
+  'adjusted title'
+- new bounding box option keys:
+  'enlarge top by', 'enlarge bottom by', 'enlarge left by', 'enlarge right by',
+  'toggle enlargement'
+- preparations for a future skin changing option implemented
+- commands \brackets and \docAuxCommand added to the documentation library
+- documentation rearranged
+
+version 1.30 (2012/04/20)
+- several internal code changes to provide a 'skin' exchange mechanism
+- new keys for the core package:
+  'frame engine', 'interior titled engine', 'interior engine', 'segmentation engine'
+  'skin', 'graphical environment', 'geometry nodes', 'colupper', 'collower'
+- tcolorbox now defined as 'long' macro
+- new keys for the library 'listings':
+  'comment', 'listing and comment', 'comment and listing'
+- new library 'skins' with the skins
+  'standard', 'enhanced', 'freelance', 'bicolor', 'beamer', 'widget'
+- keys for the library 'skins':
+  'frame style', 'interior style', 'segmentation style'
+  'frame code', 'interior titled code', 'interior code', 'segmentation code',
+  'colbacklower'
+
+version 2.00 (2013/03/01)
+- breaking news: the new library 'breakable' adds breaking support to tcolorbox.
+- e-TeX now used instead of calc
+- new key 'adjust text' and new implementation for 'adjusted title'
+- new geometry keys:
+  'toprule', 'toprule at break', 'bottomrule', 'bottomrule at break',
+  'leftrule', 'rightrule', 'titlerule', 'outer arc', 'auto outer arc',
+  'toptitle', 'bottomtitle'
+- new bounding box keys:
+  'enlarge top at break by', 'enlarge bottom at break by'
+- new overlay keys:
+  'overlay', 'no overlay', 'overlay broken', 'overlay unbroken',
+  'overlay first', 'overlay middle', 'overlay last',
+  'overlay unbroken and first', 'overlay middle and last'
+- new key: 'parbox' to change text behaviour
+- new library 'breakable' for breakable boxes with the new keys:
+  'breakable', 'unbreakable', 'title after break', 'notitle after break',
+  'adjusted title after break', 'lines before break', 'shrink break goal'
+- new keys for the 'skins' library
+  'skin first', 'skin middle', 'skin last', 'title engine', 'pathfirst',
+  'pathmiddle', 'pathlast', 'title style', 'title code', 'enhancedfirst',
+  'enhancedmiddle', 'enhancedlast', 'enhanced', 'marker', 'bicolor',
+  'bicolorfirst', 'bicolormiddle', 'bicolorlast', 'beamer',
+  'beamerfirst', 'beamermiddle', 'beamerlast', 'draft', 'freelance', 'standard'
+- NOTE: skins 'beamer' and 'widget' changed
+  use the new style options 'beamer' and 'widget' to get the old appearance
+- new watermark keys:
+  'watermark text', 'watermark text on', 'watermark graphics',
+  'watermark graphics on', 'watermark tikz', 'watermark tikz on',
+  'no watermark', 'watermark opacity', 'watermark color',
+  'watermark zoom', 'watermark stretch'
+
+version 2.01 (2013/03/07)
+- bug fix: superfluous vertical space for a breakable box which appeared after a page break
+- bug fix: height computation error when a broken boxed starts with a segmentation line
+- new key for the 'listings' library:
+  'listing inputencoding'
+- new library 'listingsutf8' as variant of 'listings' with new key
+  'listing utf8'
+- keys 'toprule at break', 'bottomrule at break',
+  'enlarge top at break by', 'enlarge bottom at break by'
+  moved from core package to 'breakable' library.
+- new keys for the 'breakable' library:
+  'topsep at break', 'bottomsep at break', 'pad before break',
+  'pad after break', 'pad at break'
+
+version 2.02 (2013/03/13)
+- minor bug fix: segmentation line of 'enhanced' now matches 'standard'
+- new macro '\tcbox' to draw a colorbox fitted to the content width
+- new key 'autoparskip' to detect usage of package parskip automatically
+- new key 'nobeforeafter'
+- new macro '\tcbline' in the 'skins' library to draw 'just lines'
+- new key 'colbacktitle' for the 'skins' library
+
+version 2.10 (2013/04/09)
+- bug fix: \tcbox ignored font settings
+- outdated documentation in German removed from package
+- new core package keys:
+  'oversize', 'tcbox raise', 'tcbox raise base',
+  'before title', 'after title', 'before upper', 'after upper', 'before lower',
+  'after lower', 'center title', 'center upper', 'center lower',
+  'tabularx*', 'tabularx', 'tikz upper', 'tikz lower',
+  'shrink tight', 'extrude left by', 'extrude right by', 'extrude top by',
+  'extrude bottom by', 'extrude by'
+- the 'theorems' library now loads 'amsmath'
+- new macros for the 'theorems' library:
+  '\tcboxmath', '\tcbhighmath'
+- new keys for the 'theorems' library:
+  'math upper', 'math lower', 'math', 'highlight math', 'highlight math style',
+  'ams equation upper', 'ams equation lower', 'ams equation', 'ams equation* upper',
+  'ams equation* lower', 'ams equation*', 'ams align upper', 'ams align lower',
+  'ams align', 'ams align* upper', 'ams align* lower', 'ams align*',
+  'ams gather upper', 'ams gather lower', 'ams gather', 'ams gather* upper',
+  'ams gather* lower', 'ams gather*',
+  'ams nodisplayskip upper', 'ams nodisplayskip lower', 'ams nodisplayskip'
+- new library 'hooks' for hook options with the new keys:
+  'before upper app', 'before upper pre', 'after upper app', 'after upper pre',
+  'before lower app', 'before lower pre', 'after lower app', 'after lower pre',
+  'before title app', 'before title pre', 'after title app', 'after title pre',
+  'before app', 'before pre', 'after app', 'after pre',
+  'overlay unbroken app', 'overlay unbroken pre', 'overlay first app', 'overlay first pre',
+  'overlay middle app', 'overlay middle pre', 'overlay last app', 'overlay last pre',
+  'overlay app', 'overlay pre', 'overlay broken app', 'overlay broken pre',
+  'overlay unbroken and first app', 'overlay unbroken and first pre',
+  'overlay middle and last app', 'overlay middle and last pre',
+  'watermark tikz app', 'watermark tikz pre', 'watermark tikz app on', 'watermark tikz pre on',
+  'watermark graphics app', 'watermark graphics pre', 'watermark graphics app on', 'watermark graphics pre on',
+  'watermark text app', 'watermark text pre', 'watermark text app on', 'watermark text pre on',
+  'frame code app', 'frame code pre', 'interior titled code app', 'interior titled code pre',
+  'interior code app', 'interior code pre', 'segmentation code app', 'segmentation code pre',
+  'title code app', 'title code pre'
+- colorization of source code snippets in the documentation
+
+version 2.20 (2013/04/17)
+- bug fix: problem with breaking boxes after headings
+- new feature: support for boxes with side by side content
+- new keys:
+  'sidebyside', 'sidebyside align', 'sidebyside gap',
+  'lefthand width', 'righthand width', 'lefthand ratio', 'righthand ratio'
+- key 'nofloat' documented
+- new keys for the 'listings' library:
+  'listing side text', 'text side listing'
+  'listing outside text', 'text outside listing'
+- new keys for the 'skins' library:
+  'frame hidden', 'interior hidden', 'segmentation hidden', 'title hidden'
+- new environments for the 'documentation' library:
+  'dispExample*', 'dispListing*'
+- the default style for 'highlight math' is changed to have no title
+- minor change of internal width computation
+- minor internal fixes
+- slight overhaul of the documentation
+
+version 2.21 (2013/04/23)
+- bug fix: \tcbox and 'sidebyside' needed 'breakable' library
+- bug fix: library 'tcbhooks' relied on etoolbox package
+- bug fix: breaking boxes between upper part and box frame
+- new macro '\newtcolorbox'
+- new macro '\newtcblisting' for the 'listings' library
+- new key 'code'
+- documentation corrections and extensions
+
+
+
+
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/README b/Master/texmf-dist/doc/latex/tcolorbox/README
index 026ac798416..8696eff79d8 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/README
+++ b/Master/texmf-dist/doc/latex/tcolorbox/README
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %%
 %% -------------------------------------------------------------------------------------------
 %% Copyright (c) 2006-2013 by Prof. Dr. Dr. Thomas F. Sturm <thomas dot sturm at unibw dot de>
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf
index f1a94de86cf..11848764a4d 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.pdf
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex
index 3359233dee9..59d493ff090 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox-example.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcolorbox-example.tex: an example for tcolorbox
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coremacros.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coremacros.tex
index bce81fdaa22..bf52c71934b 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coremacros.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coremacros.tex
@@ -100,4 +100,44 @@ Text \tcbox[tcbox raise base]{Hello World}\hfill
 \end{dispExample}
 \end{docCommand}
 
+\clearpage
+\begin{docCommand}{newtcolorbox}{\marg{name}\oarg{number}\oarg{default}\marg{options}}
+  Creates a new environment \meta{name} based on \refEnv{tcolorbox}.
+  Basically, |\newtcolorbox| operates like |\newenvironment|. This means,
+  the new environment \meta{name} optionally takes \meta{number} arguments, where
+  \meta{default} is the default value for the optional first argument.
+  The \meta{options} are given to the underlying |tcolorbox|.
+  Note that \refKey{/tcb/savedelimiter} is set to the given \meta{name}
+  automatically.
+\begin{dispExample*}{sbs,lefthand ratio=0.6}
+\newtcolorbox{mybox}{colback=red!5!white,
+  colframe=red!75!black}
+
+\begin{mybox}
+This is my own box.
+\end{mybox}
+\end{dispExample*}
+
+\begin{dispExample*}{sbs,lefthand ratio=0.6}
+\newtcolorbox{mybox}[1]{colback=red!5!white,
+  colframe=red!75!black,fonttitle=\bfseries,
+  title=#1}
+
+\begin{mybox}{Hello there}
+This is my own box with a mandatory title.
+\end{mybox}
+\end{dispExample*}
+
+\begin{dispExample*}{sbs,lefthand ratio=0.6}
+\newtcolorbox{mybox}[2][]{colback=red!5!white,
+  colframe=red!75!black,fonttitle=\bfseries,
+  title=#2,#1}
+
+\begin{mybox}[colback=yellow]{Hello there}
+This is my own box with a mandatory title
+and options.
+\end{mybox}
+\end{dispExample*}
+\end{docCommand}
+
 
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex
index 88b534dda7b..867e9890745 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.coreoptions.tex
@@ -123,6 +123,26 @@ Now, the saved part is used:
 \input{\jobname_bspsave2.tex}
 \end{tcolorbox}
 \end{dispExample}
+
+The |savedelimiter| is used implicitely with \refCom{newtcolorbox} which
+allows a more convenient usage:
+\begin{dispExample}
+\newtcolorbox{mybox}[1]{%
+             savelowerto=\jobname_bspsave2.tex,lowerbox=ignored,
+             colback=red!5!white,colframe=red!75!black,fonttitle=\bfseries,
+             title=#1}%
+
+\begin{mybox}{My Example}
+Upper part.
+\tcblower
+Saved lower part!
+\end{mybox}
+
+Now, the saved part is used:
+\begin{tcolorbox}[colback=green!5]
+\input{\jobname_bspsave2.tex}
+\end{tcolorbox}
+\end{dispExample}
 \end{docTcbKey}
 
 
@@ -928,7 +948,7 @@ This is the lower part.
 
 \clearpage
 \begin{docTcbKey}{tabularx}{=\meta{preamble}}{style}
-  This style sets \refKey{/tcb/before lower} and \refKey{/tcb/after lower}
+  This style sets \refKey{/tcb/before upper} and \refKey{/tcb/after upper}
   and several geometry keys to support a |tabularx| with the
   given \meta{preamble}.
   The package |tabularx| \cite {carlisle:1999a} has to be loaded separately.
@@ -1007,6 +1027,22 @@ One     & Two     & Three \\\hline\hline
 
 
 \clearpage
+\begin{docTcbKey}{code}{=\meta{code}}{no default, initially unset}
+  The given \meta{code} is executed immediately. This option is useful
+  to place some arbitrary code into an option list.
+\begin{dispExample}
+\tcbset{colback=red!5!white,colframe=red!75!black,
+  code={Useless at this spot but functional.},
+  fonttitle=\bfseries}
+
+\begin{tcolorbox}[code={\newcommand{\mycommand}{\textit{working}}},
+  title=My \mycommand\ title]
+This is a \textbf{tcolorbox}.
+\end{tcolorbox}
+\end{dispExample}
+\end{docTcbKey}
+
+\clearpage
 \subsection{Overlays}\label{subsec:overlays}
 With an overlay, arbitrary \meta{graphical code} can be added to a
 |tcolorbox|. This code is executed \emph{after} the frame and interior are
@@ -1116,6 +1152,61 @@ This is the lower part.
 
 
 
+\begin{dispListing*}{breakable,before upper={This example demonstrates
+the application of break sequence specific overlay options.
+Here, we define an environment |myexample| based
+on |tcolorbox| where the visible drawing is done totally by overlay keys.\par
+Here, the first application of |myexample| produces an unbroken |tcolorbox|.
+The frame is drawn by the code given with \refKey{/tcb/overlay unbroken}.\par
+The second application of |myexample| is broken into several parts which
+are drawn by the codes given with
+\refKey{/tcb/overlay first}, \refKey{/tcb/overlay middle}, and
+\refKey{/tcb/overlay last}.
+\par\bigskip
+}}
+% Preamble:
+%\usepackage{tikz,lipsum,calc}
+%\tcbuselibrary{skins,breakable}
+%\newcounter{example}
+%\newlength{\examlen}
+\colorlet{colexam}{red!75!black}
+
+\newtcolorbox{myexample}{%
+  code={\refstepcounter{example}%
+        \settowidth{\examlen}{\Large\bfseries Example \arabic{example}}},%
+  title=Example \arabic{example},
+  coltitle=colexam,fonttitle=\Large\bfseries,
+  enhanced,breakable,before=\par\medskip,parbox=false,
+  frame hidden,interior hidden,segmentation hidden,
+  boxsep=0pt,left=0pt,right=3mm,toptitle=2mm,pad at break=0mm,
+  overlay unbroken={\draw[colexam,line width=1pt] (frame.north west)
+    --([xshift=-0.5pt]frame.north east)--([xshift=-0.5pt]frame.south east)
+    --(frame.south west);
+    \draw[colexam,line width=2pt] ([yshift=0.5pt]frame.north west)
+    -- +(\examlen,0pt);},
+  overlay first={\draw[colexam,line width=1pt] (frame.north west)
+    --([xshift=-0.5pt]frame.north east)--([xshift=-0.5pt]frame.south east);
+    \draw[red!75!black,line width=2pt] ([yshift=0.5pt]frame.north west)
+    -- +(\examlen,0pt);},
+  overlay middle={\draw[colexam,line width=1pt] ([xshift=-0.5pt]frame.north east)
+    --([xshift=-0.5pt]frame.south east); },
+  overlay last={\draw[colexam,line width=1pt] ([xshift=-0.5pt]frame.north east)
+    --([xshift=-0.5pt]frame.south east)--(frame.south west);}%
+}
+
+\begin{myexample}
+\lipsum[1]
+\end{myexample}
+
+\begin{myexample}
+\lipsum[2-14]
+\end{myexample}
+
+\lipsum[15]% following text
+\end{dispListing*}
+{\tcbusetemp}
+
+
 \clearpage
 \subsection{Floating Objects}
 \begin{docTcbKey}{floatplacement}{=\meta{values}}{no default, initially \texttt{htb}}
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex
index 2edcab150f2..16cbbb6ccf0 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.listings.tex
@@ -35,7 +35,8 @@ This is a \LaTeX\ example which displays the text as source code
 and in compiled form.
 \end{tcblisting}
 \end{dispExample}
-{\tcbset{breakable}\begin{dispExample}
+\clearpage
+\begin{dispExample}
 \begin{tcblisting}{colback=yellow!5,colframe=yellow!50!black,listing only,
     title=This is source code in another language (XML), fonttitle=\bfseries,
   listing options={language=XML,columns=fullflexible,keywordstyle=\color{red}}}
@@ -47,7 +48,6 @@ and in compiled form.
 </project>
 \end{tcblisting}
 \end{dispExample}
-}
 \end{docEnvironment}
 
 
@@ -90,7 +90,7 @@ This \textbf{text} is written to a standardized file for later usage.
 \end{dispExample}
 \end{docCommand}
 
-\enlargethispage*{5mm}
+%\enlargethispage*{5mm}
 \begin{docCommand}{tcbusetemplisting}{}
   Typesets text as listing from a temporary file which was written by
   \refEnv{tcbwritetemp}.
@@ -98,6 +98,61 @@ This \textbf{text} is written to a standardized file for later usage.
 
 
 \clearpage
+\begin{docCommand}{newtcblisting}{\marg{name}\oarg{number}\oarg{default}\marg{options}}
+  Creates a new environment \meta{name} based on \refEnv{tcblisting}.
+  Basically, |\newtcblisting| operates like |\newenvironment|. This means,
+  the new environment \meta{name} optionally takes \meta{number} arguments, where
+  \meta{default} is the default value for the optional first argument.
+  The \meta{options} are given to the underlying |tcblisting|.
+  Note that \refKey{/tcb/savedelimiter} is set to the given \meta{name}
+  automatically.
+\begin{dispExample*}{sbs,lefthand ratio=0.5}
+\newtcblisting{mybox}{%
+  colback=red!5!white,
+  colframe=red!75!black}
+
+\begin{mybox}
+This is my \LaTeX\ box.
+\end{mybox}
+\end{dispExample*}
+
+\begin{dispExample*}{sbs,lefthand ratio=0.5}
+\newtcblisting{mybox}[1]{%
+  colback=red!5!white,
+  colframe=red!75!black,
+  fonttitle=\bfseries,
+  title=#1}
+
+\begin{mybox}{Listing Box}
+This is my \LaTeX\ box.
+\end{mybox}
+\end{dispExample*}
+
+\begin{dispExample*}{sbs,lefthand ratio=0.5}
+\newtcblisting{mybox}[2][]{%
+  colback=red!5!white,
+  colframe=red!75!black,
+  fonttitle=\bfseries,
+  title=#2,#1}
+
+\begin{mybox}[listing only]
+  {Listing Box}
+This is my \LaTeX\ box.
+\end{mybox}
+\bigskip
+
+\begin{mybox}[listing side text]
+  {Listing Box}
+This is my
+\LaTeX\ box.
+\end{mybox}
+
+\end{dispExample*}
+\end{docCommand}
+
+
+
+\clearpage
 \subsection{Option Keys of the Library}
 For the \meta{options} in \refEnv{tcblisting} respectively \refCom{tcbinputlisting}
 the following |pgf| keys can be applied. The key tree path |/tcb/| is not to
@@ -327,9 +382,9 @@ For the next examples, two environments
 are defined for abbreviation.
 
 \begin{dispListing}
-\newenvironment{texexp}[1]{\tcblisting{texexp,#1}}{\endtcblisting}
+\newtcblisting{texexp}[1]{texexp,#1}
 
-\newenvironment{texexptitled}[3][]{\tcblisting{example={#2}{#3},#1}}{\endtcblisting}
+\newtcblisting{texexptitled}[3][]{example={#2}{#3},#1}
 \end{dispListing}
 \tcbusetemp
 
@@ -536,22 +591,16 @@ Inside the exercise text, there may be text parts which are needed as
 saved by \refEnv{tcbwritetemp} and used in compiled form by \refCom{tcbusetemp}
 or as source code by \refCom{tcbusetemplisting}.
 
-At first, we generate some new keys. Since exercises and solutions should
-be numbered, we force to use a label \meta{marker} while using the style |texercise|.
+At first, we generate some a common style for the exercises and the
+solutions. Further, since exercises and solutions should
+be numbered, we force to use a label \meta{marker}.
 Automatically, the label |exe:|\meta{marker} is used to mark the exercise
 and the label |sol:|\meta{marker} is used to mark the solution.
 
 \begin{dispListing}
-\tcbset{
-texercisestyle/.style={arc=0.5mm, colframe=blue!25!yellow!90!white,
+\tcbset{texercisestyle/.style={arc=0.5mm, colframe=blue!25!yellow!90!white,
   colback=blue!25!yellow!5!white, coltitle=blue!25!yellow!40!black,
-  fonttitle=\small\sffamily\bfseries, fontupper=\small, fontlower=\small},
-texercise/.code={\refstepcounter{texercise}\label{exe:#1}\writesol{#1}%
-  \pgfkeysalso{texercisestyle,
-    listing file={\solfile\thetexercise},
-    title={Exercise \arabic{texercise}\hfill\mdseries Solution on page \pageref{sol:#1}}
-  }}
-}
+  fonttitle=\small\sffamily\bfseries, fontupper=\small, fontlower=\small}}
 \end{dispListing}
 \tcbusetemp
 
@@ -559,9 +608,11 @@ With these preparations, the kernel environment |texercise| for our
 exercises is created quickly:
 
 \begin{dispListing}
-\newenvironment{texercise}[2][]{%
-  \tcolorbox[texercise=#2,savedelimiter=texercise,#1]}%
-  {\endtcolorbox}
+\newtcolorbox{texercise}[2][]{texercisestyle,
+  code={\refstepcounter{texercise}\label{exe:#2}\writesol{#2}},
+  listing file={\solfile\thetexercise},
+  title={Exercise \arabic{texercise}\hfill\mdseries Solution on page \pageref{sol:#2}},
+  #1}
 \end{dispListing}
 \tcbusetemp
 
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex
index cb0feeb2f21..0bfdac01ef9 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.skins.tex
@@ -971,13 +971,51 @@ Nevertheless, this skin can be applied independently.
   This styles relies on the skin \refSkin{enhancedmiddle}. It is
   intended to be used as an optical marker like a highlighter pen.
 \begin{dispExample}
-\begin{marker}
+\begin{tcolorbox}[marker]
 \lipsum[2]
-\end{marker}
+\end{tcolorbox}
 \end{dispExample}
 \end{docTcbKey}
 
+\clearpage
 
+\begin{dispListing*}{before upper={This examples demonstrates the creation of several
+  \emph{text marker} environments based on \refSkin{enhancedmiddle}.\par\medskip}}
+\tcbset{textmarker/.style={%
+    skin=enhancedmiddle,breakable,parbox=false,
+    boxrule=0mm,leftrule=5mm,rightrule=5mm,boxsep=0mm,arc=0mm,outer arc=0mm,
+    left=3mm,right=3mm,top=1mm,bottom=1mm,enlarge left by=-8mm,enlarge right by=-8mm,
+    toptitle=1mm,bottomtitle=1mm,width=\the\dimexpr\linewidth+1.6cm\relax}}
+
+\newtcolorbox{yellow}{textmarker,colback=yellow!5!white,colframe=yellow}
+\newtcolorbox{orange}{textmarker,colback=DarkOrange!5!white,
+                        colframe=DarkOrange!75!yellow}
+\newtcolorbox{red}{textmarker,colback=red!5!white,colframe=red}
+\newtcolorbox{blue}{textmarker,colback=DeepSkyBlue!5!white,colframe=DeepSkyBlue}
+\newtcolorbox{green}{textmarker,colback=Chartreuse!5!white,colframe=Chartreuse}
+
+\begin{yellow}
+  \lipsum[1]
+\end{yellow}
+
+\begin{orange}
+  \lipsum[2]
+\end{orange}
+
+\begin{red}
+  \lipsum[3]
+\end{red}
+
+\begin{green}
+  \lipsum[4]
+\end{green}
+
+\begin{blue}
+  \lipsum[5]
+\end{blue}
+\lipsum[6]% following text
+\end{dispListing*}
+{\tcbusetemp}
 
 
 \clearpage
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex
index c890a8a6223..4700bdc5dbd 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.doc.theorems.tex
@@ -294,6 +294,30 @@ created by hand or using \refCom{tcbmaketheorem}.
 \end{dispExample}
 \end{docTcbKey}
 
+\bigskip
+New colored mathematical environments are easily created using
+\refCom{newtcolorbox}:
+
+\begin{dispExample}
+\newtcolorbox{mymath}{ams gather*,colback=yellow!10!white,colframe=red!50!black}
+
+\begin{mymath}
+  \sum\limits_{n=1}^{\infty} \frac{1}{n} = \infty.\\
+  \int x^2 ~\text{d}x = \frac13 x^3 + c.
+\end{mymath}
+\end{dispExample}
+
+\bigskip
+\begin{marker}
+  All described options like \refKey{/tcb/ams gather upper}, \refKey{/tcb/ams gather lower},
+  \refKey{/tcb/ams gather} are (partially) setting (overwritting) the
+  keys \refKey{/tcb/before upper}, \refKey{/tcb/after upper},
+  \refKey{/tcb/before lower}, \refKey{/tcb/after lower}.\par
+  Therefore, e.\,g.\ |\tcbset{ams gather,before upper={\text{Pythagoras:}}}|
+  produces an invalid result. For this case, you are invited to use\\
+  |\tcbset{ams gather,before upper app={\text{Pythagoras:}}}|,\\
+  see \refKey{/tcb/before upper app}.
+\end{marker}
 
 %
 \clearpage
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf
index 8ca73d17d90..7685c8f8a7f 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.pdf
diff --git a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex
index b6128360346..c3ab1f3b3bc 100644
--- a/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex
+++ b/Master/texmf-dist/doc/latex/tcolorbox/tcolorbox.tex
@@ -1,5 +1,5 @@
 % \LaTeX-Main\
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcolorbox.tex: Manual
 %%
 %% -------------------------------------------------------------------------------------------
@@ -82,14 +82,19 @@
   pdfkeywords={colored boxes, LaTeX examples, theorems}
 }
 
-\def\version{2.20}%
-\def\datum{2013/04/17}%
+\def\version{2.21}%
+\def\datum{2013/04/23}%
 \makeindex
 
+
+
 \newcounter{texexp}
 \newcounter{texercise}
 \newcounter{mytheorem}[section]
 
+\newcounter{example}
+\newlength{\examlen}
+
 
 \lstdefinestyle{mydocumentation}{style=tcbdocumentation,
   classoffset=0,
@@ -99,10 +104,10 @@
   classoffset=1,
   % tcolorbox macros
   moretexcs={% core
-    endtcolorbox,endtcbverbatimwrite,
+    endtcolorbox,endtcbverbatimwrite,newtcolorbox,tcbusetemp,
     tcblower,tcbox,tcbset,tcbuselibrary,tcolorbox,tcbverbatimwrite,
     % listings
-    endtcblisting,
+    endtcblisting,newtcblisting,
     tcblisting,tcbinputlisting,tcbuselistingtext,tcbuselistinglisting,tcbusetemplisting,
     % theorems
     tcbmaketheorem,tcboxmath,tcbhighmath,
@@ -124,7 +129,7 @@
   morekeywords={% core
     adjusted,adjust,after,arc,auto,autoparskip,align,
     before,bottom,boxsep,boxrule,bottomtitle,bottomrule,broken,
-    collower,coltext,coltitle,colback,colframe,colupper,center,
+    collower,coltext,coltitle,colback,colframe,colupper,center,code,
     equal,enlarge,enlargement,extrude,
     fontupper,fontlower,fonttitle,first,floatplacement,float,
     group,gap,
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
index db889791249..5e1a42ea4cd 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbbreakable.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcbbreakable.code.tex: Code for breakable colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -20,8 +20,6 @@
 \makeatletter
 \def\tcblibrary@breakable@loaded{}
 
-\let\tcb@drawcolorbox@standalone=\tcb@drawcolorbox
-
 \let\tcb@parboxrestore@true=\tcb@parboxrestore
 \def\tcb@parboxrestore@false{\vskip-\parskip}
 
@@ -209,7 +207,11 @@
     \tcbdimto\tcb@split@dim{\tcb@split@dim-\tcb@h@upper-\tcb@h@segment}
     \ifdim\tcb@split@dim<\kvtcb@breakminlines\baselineskip\relax%
       \tcb@sdraw@U%
+      \iftcb@lowerspace%
       \let\tcb@split@next=\tcb@split@SL%
+      \else%
+      \let\tcb@split@next=\tcb@split@USL%
+      \fi%
     \else
       \tcb@split@lower@box%
       \tcb@sdraw@USL%
@@ -249,7 +251,11 @@
       \tcbdimto\tcb@split@dim{\tcb@split@dim-\tcb@h@upper-\tcb@h@segment}
       \ifdim\tcb@split@dim<\kvtcb@breakminlines\baselineskip\relax%
         \tcb@sdraw@U%
+        \iftcb@lowerspace%
         \let\tcb@split@next=\tcb@split@SL%
+        \else%
+        \let\tcb@split@next=\tcb@split@USL%
+        \fi%
       \else
         \tcb@split@lower@box%
         \tcb@sdraw@USL%
@@ -430,10 +436,6 @@
     \let\tcb@savebox=\tcb@vbox%
     \let\endtcb@savebox=\endtcb@vbox%
     \let\tcb@drawcolorbox=\tcb@drawcolorbox@breakable},
-  breakable@false/.code={%
-    \let\tcb@savebox=\tcb@lrbox%
-    \let\endtcb@savebox=\endtcb@lrbox%
-    \let\tcb@drawcolorbox=\tcb@drawcolorbox@standalone},
   breakable/.style={breakable@#1},
   breakable/.default=true,%
   unbreakable/.style={breakable=false},%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
index 890a5f349dd..b14d5f73c5e 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbdocumentation.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcbdocumentation.code.tex: Code for LaTeX documentations
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
index eedab8df24e..1bda22de6c2 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbhooks.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcbhooks.code.tex: Code for adding hooks
 %%
 %% -------------------------------------------------------------------------------------------
@@ -20,12 +20,15 @@
 \makeatletter
 \def\tcblibrary@hooks@loaded{}
 
+% expandonce from etoolbox
+\newcommand{\tcb@expandonce}[1]{\unexpanded\expandafter{#1}}
+
 % slim version of etoolbox'es more general macro
 \newcommand{\tcb@appto}[2]{%
   \ifx#1\relax%
   \edef#1{\unexpanded{#2}}%
   \else%
-  \edef#1{\expandonce#1\unexpanded{#2}}%
+  \edef#1{\tcb@expandonce#1\unexpanded{#2}}%
   \fi}
 
 % slim version of etoolbox'es more general macro
@@ -33,7 +36,7 @@
   \ifx#1\relax%
   \edef#1{\unexpanded{#2}}%
   \else%
-  \edef#1{\unexpanded{#2}\expandonce#1}%
+  \edef#1{\unexpanded{#2}\tcb@expandonce#1}%
   \fi}
 
 \tcbset{%
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
index 18827d89ba8..3f6dae4c39e 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistings.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcblistings.code.tex: Code for colorboxes with listings
 %%
 %% -------------------------------------------------------------------------------------------
@@ -163,4 +163,14 @@
   \tcb@temp{\kvtcb@tempfile}%
 }%
 
+\long\def\tcb@newtcblisting#1#2{\newenvironment{#1}{\tcblisting{savedelimiter=#1,#2}}{\endtcblisting}}
 
+\long\def\tcb@new@tcblisting#1[#2]#3{\newenvironment{#1}[#2]{\tcblisting{savedelimiter=#1,#3}}{\endtcblisting}}
+
+\long\def\tcb@new@@tcblisting#1[#2][#3]#4{\newenvironment{#1}[#2][#3]{\tcblisting{savedelimiter=#1,#4}}{\endtcblisting}}
+
+\long\def\new@tcblisting#1[#2]{%
+  \@ifnextchar[{\tcb@new@@tcblisting{#1}[#2]}{\tcb@new@tcblisting{#1}[#2]}}
+
+\long\def\newtcblisting#1{%
+  \@ifnextchar[{\new@tcblisting{#1}}{\tcb@newtcblisting{#1}}}
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
index 7ef2d51ad74..617febb25f7 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcblistingsutf8.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcblistingsutf8.code.tex: Code for colorboxes with listings in UTF-8
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
index aab07bdf7bc..75a6c71eccc 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbskins.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcbskins.code.tex: Code for colorboxes with different skins
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex b/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
index 09cc57d8c8d..da525707d72 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcbtheorems.code.tex
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcbtheorems.code.tex: Code for theorems in colorboxes
 %%
 %% -------------------------------------------------------------------------------------------
diff --git a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
index 9954b1f9a9c..847f31b842e 100644
--- a/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
+++ b/Master/texmf-dist/tex/latex/tcolorbox/tcolorbox.sty
@@ -1,4 +1,4 @@
-%% The LaTeX package tcolorbox - version 2.20 (2013/04/17)
+%% The LaTeX package tcolorbox - version 2.21 (2013/04/23)
 %% tcolorbox.sty: Text color boxes
 %%
 %% -------------------------------------------------------------------------------------------
@@ -18,7 +18,7 @@
 %% This work consists of all files listed in README
 %%
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{tcolorbox}[2013/04/17 version 2.20 text color boxes]
+\ProvidesPackage{tcolorbox}[2013/04/23 version 2.21 text color boxes]
 
 \RequirePackage{pgf}[2008/01/15]
 \RequirePackage{verbatim}[2003/08/22]
@@ -254,7 +254,12 @@
   righthand width/.code={\def\kvtcb@sbs@ratio{#1}\let\tcb@sbs@quota=\tcb@sbs@quota@rightwidth},
   lefthand ratio/.code={\def\kvtcb@sbs@ratio{#1}\let\tcb@sbs@quota=\tcb@sbs@quota@leftratio},
   righthand ratio/.code={\def\kvtcb@sbs@ratio{#1}\let\tcb@sbs@quota=\tcb@sbs@quota@rightratio},
-}
+  breakable@false/.code={%
+    \let\tcb@savebox=\tcb@lrbox%
+    \let\endtcb@savebox=\endtcb@lrbox%
+    \let\tcb@drawcolorbox=\tcb@drawcolorbox@standalone},
+  code/.code={#1},
+  }
 
 \tcbset{notitle,width=\linewidth,boxsep=1mm,boxrule=0.5mm,adjust text={\"Apgjy},
   left=4mm,right=4mm,top=2mm,bottom=2mm,middle=2mm,arc=1mm,lowerbox=visible,
@@ -639,10 +644,11 @@
   \end{\kvtcb@graphenv}\end{tcb@float}%
 }
 
+\let\tcb@drawcolorbox@standalone=\tcb@drawcolorbox
 
 \newcommand{\tcbox}[2][]{%
   \begingroup%
-  \tcbset{#1,unbreakable}%
+  \tcbset{#1,breakable@false}%
   \setbox0=\hbox{\begingroup\color{\kvtcb@colupper}\kvtcb@fontupper\kvtcb@before@upper\ignorespaces#2\kvtcb@after@upper\endgroup}%
   \tcbdimto{\tcb@temp@wd}{\wd0}%
   \tcbdimto{\tcb@temp@dp}{\dp0+\kvtcb@bottom+\kvtcb@boxsep+\kvtcb@bottom@rule@stand}%
@@ -655,7 +661,17 @@
   \endgroup%
 }
 
+\long\def\tcb@newtcolorbox#1#2{\newenvironment{#1}{\tcolorbox[savedelimiter=#1,#2]}{\endtcolorbox}}
+
+\long\def\tcb@new@tcolorbox#1[#2]#3{\newenvironment{#1}[#2]{\tcolorbox[savedelimiter=#1,#3]}{\endtcolorbox}}
+
+\long\def\tcb@new@@tcolorbox#1[#2][#3]#4{\newenvironment{#1}[#2][#3]{\tcolorbox[savedelimiter=#1,#4]}{\endtcolorbox}}
+
+\long\def\new@tcolorbox#1[#2]{%
+  \@ifnextchar[{\tcb@new@@tcolorbox{#1}[#2]}{\tcb@new@tcolorbox{#1}[#2]}}
 
+\long\def\newtcolorbox#1{%
+  \@ifnextchar[{\new@tcolorbox{#1}}{\tcb@newtcolorbox{#1}}}
 
 % verbatim output as in 'verbatim'