tasks (20jul14)

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+--------------------------------------------------------------------------
+the TASKS package v0.10 2014/07/20
+
+  Horizontal columned lists.
+
+--------------------------------------------------------------------------
+Clemens Niederberger
+Web:    https://github.com/cgnieder/tasks/
+E-Mail: contact@mychemistry.eu
+--------------------------------------------------------------------------
+Copyright 2013-2014 Clemens Niederberger
+
+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 `maintained'.
+
+The Current Maintainer of this work is Clemens Niederberger.
+--------------------------------------------------------------------------
+The tasks package consists of the files
+ - tasks.sty, tasks.cfg, tasks_en.tex, task_en.pdf
+ - README
+--------------------------------------------------------------------------
+If you have any ideas, questions, suggestions or bugs to report, please
+feel free to contact me.
+--------------------------------------------------------------------------
diff --git a/Master/texmf-dist/doc/latex/tasks/tasks_en.pdf b/Master/texmf-dist/doc/latex/tasks/tasks_en.pdf
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diff --git a/Master/texmf-dist/doc/latex/tasks/tasks_en.tex b/Master/texmf-dist/doc/latex/tasks/tasks_en.tex
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+% --------------------------------------------------------------------------
+% the TASKS package
+% 
+%   Horizontal columned lists.
+% 
+% --------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    https://github.com/cgnieder/tasks/
+% E-Mail: contact@mychemistry.eu
+% --------------------------------------------------------------------------
+% Copyright 2013-2014 Clemens Niederberger
+% 
+% 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 `maintained'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% --------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% --------------------------------------------------------------------------
+\documentclass[load-preamble+]{cnltx-doc}
+\usepackage{tasks}
+
+\setcnltx{
+  package  = {tasks} ,
+  authors  = Clemens Niederberger ,
+  email    = {contact@mychemistry.eu} ,
+  url      = {https://github.com/cgnieder/tasks/} ,
+  info     = {create horizontal columned lists} ,
+  add-cmds = {
+    checkedchoicebox ,
+    choicebox,
+    NewTasks,
+    settasks,
+    startnewitemline ,
+    task
+  } ,
+  add-silent-cmds = {
+    choice, correct,
+    DeclareInstance, DeclareTemplateInterface,
+    leftthumbsup,
+    sample, Sample
+  }
+}
+
+\newpackagename\ExSheets{ExSheets}
+\newpackagename\ExSheetslistings{ExSheets-listings}
+\newpackagename\cntformats{cntformats}
+\newpackagename\Tasks{tasks}
+
+% ----------------------------------------------------------------------------
+% other packages, bibliography, index
+\usepackage{xcoffins,tikz,wasysym,enumitem,booktabs,siunitx}
+\usepackage[accsupp]{acro}
+\DeclareAcronym{id}{
+  short     = id ,
+  long      = Identifier ,
+  format    = \scshape ,
+  pdfstring = ID ,
+  accsupp   = ID
+}
+
+\usepackage{filecontents}
+\usepackage{csquotes}
+
+
+
+% ----------------------------------------------------------------------------
+% example definitions that have to be done in the preamble:
+\usepackage{exsheets}
+\usepackage{dingbat}
+\NewTasks[style=multiplechoice]{multiplechoice}[\choice](3)
+\newcommand*\correct{\PrintSolutionsTF{\checkedchoicebox}{\choicebox}}
+
+
+\newcommand*\sample{This is some sample text we will use to create a somewhat
+  longer text spanning a few lines.}
+\newcommand*\Sample{\sample\ \sample\par\sample}
+
+\begin{document}
+
+\section{Motivation}
+Originally \Tasks\ has been an integral part of the
+\ExSheets\changedversion{0.7} package.  However, users told me that it indeed
+could be useful to have it as a stand-alone package not having to load the
+whole \ExSheets\ beast just for having the \env{tasks} environment available.
+Since I agree with this the environment has been extracted into a package if
+its own, \Tasks.  Since then \Tasks{} has been distributed as a package of its
+own but as part of the \ExSheets{} bundle\changedversion{0.10}.  With v0.10 I
+decided to make it a completely independent package.  So the relation to
+\ExSheets{} only is a historical one.
+
+The reason for the \env{tasks} environment is an unwritten agreement in German
+maths textbooks (exspecially in (junior) high school textbooks) to organize
+exercises in columns counting horizontally rather than vertically.  That is
+what \code{tasks} primarily is for. If you don't need this feature you're
+better off using traditional \LaTeX{} lists and the \pkg{enumitem} package for
+customization.
+
+\section{License and Requirements}\label{sec:license}
+\license
+
+\Tasks\ requires the \bnd{l3kernel}~\cite{bnd:l3kernel} bundle,
+\needpackage{xparse}, \pkg{xtemplate} and \needpackage{l3keys2e} which are
+part of the \bnd{l3packages}~\cite{bnd:l3packages} bundle,
+\pkg{epic}~\cite{pkg:epic}, \pkg{cntformats}~\cite{pkg:cntformats}, and
+\pkg{environ}~\cite{pkg:environ}.
+
+
+\section{How it works}
+\subsection{The Basics}
+The \env{tasks} environment is similar to a list like \env{enumerate} but not
+the same.  Here are some of the differences:
+\begin{itemize}
+  \item A first difference: there is no pagebreak possible inside an item but
+    only between items.
+  \item A second difference: the enumeration default is a), b), c) \ldots
+  \item A third difference: the body of the \env{tasks} environment is split
+    at \emph{every} occurrence of the item separator.  For this reason the
+    default separator is not \cs*{item} but \cs{task} so it is unique to this
+    environment only.  This directly leads to\ldots
+  \item \ldots{} a fourth difference: the \env{tasks} environment cannot be
+    nested.  You can, however, use an \env*{itemize} environment or another
+    \enquote{real} list in it.
+  \item A fifth difference: verbatim material cannot be used in it.  You'll
+    have to use \cs*{string}, \cs*{texttt} or \cs*{detokenize}.  If this
+    won't suffice then don't use \env{tasks}.
+%  \item A sixth difference: %footnotes
+\end{itemize}
+
+\begin{environments}
+  \environment{tasks}[\oarg{options}\darg{num of columns}]
+    List like environment where the single items are introduced with
+    \cs{task}.
+\end{environments}
+Let's see an example:
+\begin{example}
+  % \Sample is defined to contain some sample text:
+  % \def\sample{This is some sample text we will use to create a somewhat
+  %   longer text spanning a few lines.}
+  % \def\Sample{\sample\ \sample\par\sample}
+  Some text before the list.
+  \begin{tasks}
+    \task \Sample
+    \task \Sample
+    \task \Sample
+  \end{tasks}
+  And also some text after it.
+\end{example}
+
+The environment takes the optional argument \darg{num of columns} with which
+the number of columns used by the environment is specified.
+\begin{example}
+  \begin{tasks}(2)
+    \task \Sample
+    \task \sample\ \sample
+    \task \sample
+    \task \Sample
+    \task \sample\par\sample
+  \end{tasks}
+\end{example}
+
+\subsection{Items Spanning More Than One Column}
+Sometimes it may come in handy if an item is allowed to span more than one
+column.  \Tasks\sinceversion{0.10} supports items using the remaining space by
+adding an optional\label{optional-star} star to \cs{task}:
+\begin{example}
+  \begin{tasks}(3)
+    \task \sample
+    \task* \sample
+    \task* \sample
+    \task \sample
+    \task \sample
+  \end{tasks}
+\end{example}
+
+\Tasks\sinceversion{0.10} also supports items that span \emph{all} columns in
+any case by adding an optional bang\label{optional-bang} to \cs{task}.
+\begin{example}
+  \begin{tasks}(3)
+    \task \sample
+    \task! \sample
+    \task! \sample
+    \task \sample
+    \task \sample
+  \end{tasks}
+\end{example}
+
+The optional star has itself an optional argument with parentheses where you
+can specify the number of columns the item is supposed to span:\label{debug}
+\begin{example}
+  \settasks{debug}
+  \begin{tasks}(4)
+    \task the first
+    \task the second
+    \task the third
+    \task the fourth
+    \task*(3) the fifth item is way too long for this and needs three columns
+    \task the sixth
+    \task the seventh
+    \task*(2) the eighth item is way too long for this and needs two columns
+    \task the nineth
+    \task the tenth
+  \end{tasks}
+\end{example}
+If there are not enough columns left (say two columns but you said
+\cs{task}\sarg\Darg{3}) the argument is ignored and the maximum number of
+remaining columns is used (two in case of our example).
+
+Both optional star and optional bang can be combined with the optional
+argument for a custom label:
+\begin{example}
+  \begin{tasks}(3)
+    \task \sample
+    \task* \sample
+    \task*[(x)] \sample
+    \task \sample
+    \task \sample
+  \end{tasks}
+\end{example}
+
+Forcing a new item line manually is also possible\sinceversion{0.9} using the
+following command:
+\begin{commands}
+  \command{startnewitemline}
+    Introduce a new line in a \env{tasks} environment.
+\end{commands}
+\begin{example}
+  \begin{tasks}(4)
+    \task the first
+    \task the second
+    \task the third
+    \task the fourth
+    \task \rlap{the fifth item is way too long for this so we start a new row}
+      \startnewitemline 
+    \task the sixth
+    \task the seventh
+    \task \rlap{the eighth item also is too long} \startnewitemline
+    \task the nineth
+    \task the tenth
+  \end{tasks}
+\end{example}
+
+While this works it also needs a bit of care since the width of the items
+doesn't change which means in order to use the full width you'd have to use
+trickery like \cs*{rlap} which then means the danger of the item text sticking
+into the margin\ldots
+
+\section{Available Options}\label{sec:tasks:options}
+
+The \Tasks{} package does not have any package options\changedversion{0.10}.
+
+The environment \env{tasks} has a number of options, though, namely the
+following ones that can be set using a setup command:
+\begin{commands}
+  \command{settasks}[\marg{options}]
+    Setup command for \Tasks.
+\end{commands}
+\begin{options}
+  \keyval{style}{instance}\Default
+     Choose the instance to be used.  Read more on this in
+     section~\ref{sec:tasks}.
+  \keyval{counter-format}{counter specs}\Default
+    \sinceversion{0.9}Sets a custom label.  The letters \code{tsk} are
+    replaced with the task-counter.  An optional argument directly following
+    these letters specifies the counter format: \code{1}: \cs*{arabic},
+    \code{a}: \cs*{alph}, \code{A}: \cs*{Alph}, \code{r}: \cs*{roman} and
+    \code{R}: \cs*{Roman}.
+  \keyval{label-format}{code}\Default
+    \changedversion{0.9}Can be used to apply a formatting like, \eg,
+    \cs*{bfseries} to the labels.
+  \keyval{label}{code}\Default
+    \changedversion{0.9}Overwrite the automatic label to a custom one.
+  \keyval{label-width}{dim}\Default{1em}
+    Sets the width of the item labels.
+  \keyval{label-offset}{dim}\Default{.3333em}
+    \sinceversion{0.7}Sets the offset, \ie, the distance between label and
+    item.
+  \keyval{item-indent}{dim}\Default{2.5em}
+    \sinceversion{0.9a}The indent of an item, \ie, the horizontal space
+    available for both label and label-offset.  If
+    \[
+      \text{\code{indent}} =
+      \text{\code{label-width}} + \text{\code{label=offset}}
+    \]
+    the label will align with the textblock above (if
+    \keyis{label-align}{left} is set).  Please see figure~\ref{fig:lengths}
+    for a sketch of the available lengths and how they are set.
+  \keyval{column-sep}{dim}\Default{0pt}
+    \sinceversion{0.10}A horizontal length that is inserted between columns ot
+    items.
+  \keychoice{label-align}{left,right,center}\Default{left}
+    \sinceversion{0.7}Determines how the labels are aligned within the
+    label-box whose width is set with \option{label-width}.
+  \keyval{before-skip}{skip}\Default{0pt}
+    Sets the skip before the list.
+  \keyval{after-skip}{skip}\Default{0pt}
+    Sets the skip after the list.
+  \keyval{after-item-skip}{skip}\Default{1ex plus 1ex minus 1ex}
+    \sinceversion{0.9}This vertical skip is inserted between rows of items.
+  \keybool{resume}\Default{false}
+    The enumeration will resume from a previous \env{tasks} environment.  In
+    order to use this option properly you shouldn't mix different \env{tasks}
+    environments that both count their items.
+  \keybool{debug}\Default{false}
+    \sinceversion{0.10}If set to true \cs*{fboxsep} is set to \code{0pt}
+    inside the \env{tasks} environment and \cs*{fbox} is used to draw a frame
+    around the label boxes and the item boxes.
+\end{options}
+
+\begin{figure}
+  \centering
+  \begin{tikzpicture}[every node/.style={font=\footnotesize},scale=.5]
+    \coordinate (itemedge1) at (2,2) ;
+    \coordinate (itemedge2) at (13,2) ;
+    \draw
+      (itemedge1) -- ++(8,0) -- ++(0,-2) -- ++(-8,0) -- cycle ;
+    \draw
+      (itemedge1) ++(-.5,0) coordinate(labeledge1)
+      -- ++(-1,0) --++ (0,-1) --++(1,0) --++(0,1) ;
+    \draw (itemedge1) ++(-2,0) -- ++(0,-2) ;
+    \draw
+      (itemedge2) -- ++(8,0) -- ++(0,-2) -- ++(-8,0) -- cycle ;
+    \draw
+      (itemedge2) ++(-.3,0) coordinate(labeledge2)
+      -- ++(-1,0) --++ (0,-1) --++(1,0) --++(0,1) ;
+    \draw (itemedge2) ++(-2,0) -- ++(0,-2) ;
+    \draw[<->] (itemedge2) ++(-2,0) --node[above]{column sep} ++(-1,0) ;
+    \draw[<->] (0,-.5) --node[below]{item indent} (2,-.5) ;
+    \draw[<->] (2,-.5) --node[below]{item width} (10,-.5) ;
+    \draw[<->] (labeledge1) ++(0,1) --node[above]{label width} ++(-1,0) ;
+    \draw[<->] (labeledge1) --node[above]{item offset} ++(.5,0) ;
+  \end{tikzpicture}
+  \caption{A visual representation of the used lengths.}
+  \label{fig:lengths}
+\end{figure}
+
+Now the same list as above but with three columns and a different label:
+\begin{example}
+  \begin{tasks}[counter-format=(tsk[r]),label-width=4ex](2)
+    \task \Sample
+    \task \sample\ \sample
+    \task \sample
+    \task \Sample
+    \task \sample\par\sample
+  \end{tasks}
+\end{example}
+% \begin{tasks}[counter-format=(tsk[r]),label-width=4ex](3)
+%  \task \Sample
+%  \task \sample\ \sample
+%  \task \sample
+%  \task \Sample
+%  \task \sample\par\sample
+% \end{tasks}
+
+Let's use it inside a question, \ie, inside \ExSheets' \env{question}
+environment:
+\begin{example}
+  % since settings are local the following ones will be lost
+  % outside this example;
+  \settasks{
+    counter-format = qu.tsk ,
+    item-indent    = 2em ,
+    label-width    = 2em ,
+    label-offset   = 0pt
+  }
+  \begin{question}[type=exam]{4}
+    I have these two tasks for you. Shall we begin?
+    \begin{tasks}(2)
+      \task The first task: easy!
+      \task The second task: even more so!
+    \end{tasks}
+  \end{question}
+  \begin{solution}[print]
+    Now, let's see\ldots\ ah, yes:
+    \begin{tasks}
+      \task This is the first solution. Told you it was easy.
+      \task This is the second solution. And of course you knew that!
+    \end{tasks}
+  \end{solution}
+\end{example}
+
+Finally let's see what the \option{debug} option does (you could see it
+already on page~\pageref{debug}):
+\begin{example}
+  \settasks{debug}
+  \begin{tasks}(2)
+    \task \Sample
+    \task \Sample
+  \end{tasks}
+\end{example}
+
+\section{Available Instances}\label{sec:tasks:instances}
+When you use the package option \option{more} of the \Tasks\ package or load
+\ExSheets\ with the \option{load-tasks} option there are currently three
+additional instances for the \code{tasks} object available:
+\begin{description}
+  \item[itemize] uses \cs*{labelitemi} as labels.
+  \item[enumerate] enumerates the items with 1., 2., \ldots
+  \item[multiplechoice] a --~well~-- `multiple choice' list.
+\end{description}
+\begin{example}
+  \begin{tasks}[style=itemize](2)
+    \task that's just how\ldots
+    \task \ldots we expected
+  \end{tasks}
+  \begin{tasks}[style=enumerate](2)
+    \task that's just how\ldots
+    \task \ldots we expected
+  \end{tasks}
+  \begin{tasks}[style=multiplechoice](2)
+    \task that's just how\ldots
+    \task \ldots we expected
+  \end{tasks}
+\end{example}
+
+\section{Custom Labels}
+If you want to change a single label inside a list, you can use the optional
+argument of \cs{task}. This will temporarily overwrite the default label.
+\begin{example}[side-by-side]
+  \begin{tasks}[style=itemize]
+    \task a standard item
+    \task another one
+    \task[+] a different one
+    \task and another one
+  \end{tasks}
+\end{example}
+
+\section{New Tasks}
+It is possible to add custom environments that work like the \code{tasks}
+environment.
+\begin{commands}
+  \command{NewTasks}[\oarg{options}\marg{name}\oarg{separator}\darg{cols}]
+    Define environment \meta{name} that uses \meta{separator} to introduce a
+    new item.  Default for \meta{separator} is \cs{task}, default for
+    \meta{cols} is \code{1}.  The \meta{options} are the ones described in
+    section~\ref{sec:tasks:options}.
+  \command{RenewTasks}[\oarg{options}\marg{name}\oarg{separator}\darg{cols}]
+    Renew environment previously defined with \cs{NewTasks}.
+\end{commands}
+The \env{tasks} environment is defined as follows:
+\begin{sourcecode}
+  \NewTasks{tasks}
+\end{sourcecode}
+
+The separator does not have to be a control sequence:
+\begin{example}
+  % preamble:
+  % \usepackage{dingbat}
+  \NewTasks[label=\footnotesize\leftthumbsup,label-width=1.3em]{done}[*]
+  \begin{done}
+    * First task
+    * Second task
+  \end{done}
+\end{example}
+Although this might seem handy or even nice I strongly advice against using
+something different than a command sequence. Remember that the items will be
+split at \emph{every} occurrence of the separator.  So in order to use the
+separator (here for example for a starred variant of a command) within an item
+it has to be hidden in braces.  This is avoided of you use a command sequence
+which even doesn't have to be defined.
+
+Please also keep in mind that the separator still has an optional star
+argument (see~\pageref{optional-star}), an optional bang argument and the
+standard optional argument.  Using \code{*} will prevent the optional star
+argument.
+
+\begin{example}
+  % preamble:
+  % \usepackage{dingbat}
+  \NewTasks[label=\footnotesize\leftthumbsup,label-width=1.3em]{done}[*]
+  \begin{done}(3)
+    * First task
+    * Second task
+    *! Third task spanning the full width available
+    * Fourth task
+  \end{done}
+\end{example}
+
+Let's say you want a \env*{multiplechoice} environment that has three columns
+in its default state.  You could do something like this:
+\begin{example}
+  % preamble:
+  % \NewTasks[style=multiplechoice]{multiplechoice}[\choice](3)
+  % \newcommand*\correct{\PrintSolutionsTF{\checkedchoicebox}{\choicebox}}
+  %
+  % \PrintSolutionsTF and the {question} environment are provided
+  % by the ExSheets package
+  \begin{question}
+    \begin{multiplechoice}
+      \choice First choice
+      \choice Second choice
+      \choice[\correct] Third choice
+    \end{multiplechoice}
+  \end{question}
+  \begin{solution}[print]
+    \begin{multiplechoice}
+      \choice First choice
+      \choice Second choice
+      \choice[\correct] Third choice
+    \end{multiplechoice}
+  \end{solution}
+\end{example}
+
+The last example shows you two additional commands:
+\begin{commands}
+  \command{choicebox}[\quad\choicebox]
+    Print an empty square.
+  \command{checkedchoicebox}[\quad\checkedchoicebox]
+    Print a crossed-out square.
+\end{commands}
+
+
+\section{Styling \Tasks}
+Equivalent to the styling of \ExSheets\ \Tasks\ uses \pkg{xtemplate} to
+declare additional instances for the lists.
+
+\subsection{The \code{tasks} Object}\label{sec:tasks}
+The object that's defined by \Tasks\ is the `tasks' object.  This time there
+are four instances available for the one template (again `default') that was
+defined.
+
+\subsubsection{Available Options}
+This section only lists the options that can be used when defining an instance
+of the `default' template.  The following subsections will give some examples
+of their usage.
+
+\begin{sourcecode}
+  \DeclareTemplateInterface{tasks}{default}{3}
+    {
+      % option        : type      = default
+      enumerate       : boolean   = true    ,
+      label           : tokenlist           ,
+      indent          : length    = 2.5em   ,
+      counter-format  : tokenlist = tsk[a]) ,
+      label-format    : tokenlist           ,
+      label-width     : length    = 1em     ,
+      label-offset    : length    = .3333em ,
+      after-item-skip : skip      = 1ex plus 1ex minus 1ex
+    }
+\end{sourcecode}
+
+\subsubsection{Predefined Instances}
+This is rather brief this time:
+\begin{sourcecode}
+  % ALPHABETIZE: a) b) c)
+  \DeclareInstance{tasks}{alphabetize}{default}{}
+  % available when `load-tasks=true':
+  % ITEMIZE:
+  \DeclareInstance{tasks}{itemize}{default}
+    {
+      enumerate   = false ,
+      label-width = 1.125em
+    }
+  % ENUMERATE:
+  \DeclareInstance{tasks}{enumerate}{default}
+    { counter-format = tsk. }
+  % MULTIPLECHOICE:
+  \DeclareInstance{tasks}{multiplechoice}{default}
+    {
+      enumerate = false       ,
+      label     = \choicebox  ,
+    }
+\end{sourcecode}
+
+\end{document}
diff --git a/Master/texmf-dist/tex/latex/tasks/tasks.cfg b/Master/texmf-dist/tex/latex/tasks/tasks.cfg
new file mode 100644
index 00000000000..12b3c50517c
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/tasks/tasks.cfg
@@ -0,0 +1,52 @@
+% --------------------------------------------------------------------------
+% the TASKS package
+% 
+%   Horizontal columned lists.
+% 
+% --------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    https://github.com/cgnieder/tasks/
+% E-Mail: contact@mychemistry.eu
+% --------------------------------------------------------------------------
+% Copyright 2013-2014 Clemens Niederberger
+% 
+% 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 `maintained'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% --------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% --------------------------------------------------------------------------
+% further instances for the `tasks' environment
+\ProvidesFile{tasks.cfg}
+  [\@tasks@date\space v\@tasks@version\space tasks instances]
+
+\cs_new:Npn \tasks_config_file_loaded: {}
+
+% ITEMIZE:
+\DeclareInstance {tasks} {itemize} {default}
+  {
+    enumerate    = false ,
+    label-width  = 1.125em
+  }
+
+% ENUMERATE:
+\DeclareInstance {tasks} {enumerate} {default}
+  { counter-format = tsk. }
+
+% MULTIPLECHOICE
+\DeclareInstance {tasks} {multiplechoice} {default}
+  {
+    enumerate    = false ,
+    label        = \choicebox
+  }
+
+\tex_endinput:D
diff --git a/Master/texmf-dist/tex/latex/tasks/tasks.sty b/Master/texmf-dist/tex/latex/tasks/tasks.sty
new file mode 100644
index 00000000000..7de903b8e35
--- /dev/null
+++ b/Master/texmf-dist/tex/latex/tasks/tasks.sty
@@ -0,0 +1,753 @@
+% --------------------------------------------------------------------------
+% the TASKS package
+% 
+%   Horizontal columned lists.
+% 
+% --------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    https://github.com/cgnieder/tasks/
+% E-Mail: contact@mychemistry.eu
+% --------------------------------------------------------------------------
+% Copyright 2013-2014 Clemens Niederberger
+% 
+% 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 `maintained'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% --------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% --------------------------------------------------------------------------
+\def\@tasks@date{2014/07/20}
+\def\@tasks@version{0.10}
+
+\RequirePackage { expl3 , xparse , l3keys2e }
+\ProvidesExplPackage
+  {tasks}
+  {\@tasks@date}
+  {\@tasks@version}
+  {Horizontal columned lists.}
+
+% --------------------------------------------------------------------------
+% check expl3 version:
+\@ifpackagelater { expl3 } { 2014/01/01 }
+  { }
+  {
+    \PackageError { tasks } { Support~package~expl3~too~old }
+      {
+        You~need~to~update~your~installation~of~the~bundles~'l3kernel'~and~
+        'l3packages'.\MessageBreak
+        Loading~tasks~will~abort!
+      }
+    \tex_endinput:D
+  }
+
+% --------------------------------------------------------------------------
+% requirements:
+\RequirePackage { epic , cntformats , xtemplate , environ }
+
+\msg_new:nnn {tasks} {deprecated-option}
+  {
+    The~ option~ `#1'~ has~ been~ removed~ from~ the~ `tasks'~ package.~
+    Please~ see~ the~ documentation~ for~details.
+  }
+
+
+% --------------------------------------------------------------------------
+% variants of kernel functions:
+\cs_generate_variant:Nn \tl_if_eq:nnTF { V }
+\cs_generate_variant:Nn \tl_if_eq:nnT  { V }
+
+% --------------------------------------------------------------------------
+% variables:
+\seq_new:N    \l__tasks_seq
+
+\int_new:N    \l__tasks_depth_int
+\int_new:N    \g__tasks_int
+\int_new:N    \g__tasks_total_items_int
+\int_new:N    \l__tasks_columns_int
+\int_new:N    \l__tasks_rows_int
+\int_new:N    \g__tasks_current_col_num_int
+\int_new:N    \g__tasks_current_row_num_int
+\int_new:N    \l__tasks_item_columns_int
+
+\bool_new:N   \l__tasks_enumerate_bool
+\bool_new:N   \l__tasks_resume_bool
+\bool_new:N   \l__tasks_load_tasks_bool
+\bool_new:N   \l__tasks_label_width_bool
+\bool_new:N   \l__tasks_item_indent_bool
+\bool_new:N   \l__tasks_label_offset_bool
+\bool_new:N   \l__tasks_custom_label_bool
+\bool_new:N   \l__tasks_custom_after_item_skip_bool
+\bool_new:N   \l__tasks_debug_bool
+\bool_new:N   \l__tasks_item_full_line_bool
+\bool_new:N   \l__tasks_item_rest_of_line_bool
+
+\tl_new:N     \l__tasks_instance_tl
+\tl_new:N     \l__tasks_label_tl
+\tl_new:N     \l__tasks_custom_label_tl
+\tl_new:N     \l__tasks_label_pattern_tl
+\tl_new:N     \l__tasks_custom_label_pattern_tl
+\tl_new:N     \l__tasks_label_format_tl
+\tl_new:N     \l__tasks_custom_label_format_tl
+\tl_new:N     \l__tasks_item_fill_left_tl
+\tl_new:N     \l__tasks_item_fill_right_tl
+\tl_new:N     \l__tasks_label_align_tl
+% \tl_new:N     \task
+\tl_new:N     \l__tasks_item_tl
+\tl_new:N     \l__tasks_tmp_label_tl
+
+\dim_new:N    \l__tasks_item_indent_dim
+\dim_new:N    \l__tasks_item_default_indent_dim
+\dim_new:N    \l__tasks_item_width_dim
+\dim_new:N    \l__tasks_label_width_dim
+\dim_new:N    \l__tasks_label_default_width_dim
+\dim_new:N    \l__tasks_label_offset_dim
+\dim_new:N    \l__tasks_label_default_offset_dim
+\dim_new:N    \l__tasks_column_sep_dim
+
+\skip_new:N   \l__tasks_after_item_skip
+\skip_new:N   \l__tasks_custom_after_item_skip
+\skip_new:N   \l__tasks_before_list_skip
+\skip_new:N   \l__tasks_after_list_skip
+
+\coffin_new:N \l__tasks_item_coffin
+\coffin_new:N \l__tasks_label_coffin
+
+\NewCounterPattern* [ tasks ] { task } { tsk }
+\ReadCounterFrom [ tasks ] { task } \g__tasks_int
+
+% temporary variables:
+\int_new:N    \l__tasks_tmpa_int
+\int_new:N    \l__tasks_tmpb_int
+\tl_new:N     \l__tasks_tmpa_tl
+\coffin_new:N \l__tasks_tmpa_coffin
+
+\cs_new:Npn \__tasks_debug:n #1
+  {
+    \bool_if:NTF \l__tasks_debug_bool
+      { \fbox {#1} }
+      { \use:n {#1} }
+  }
+
+% --------------------------------------------------------------------------
+% collect the tasks:
+\cs_new_protected:Npn \__tasks_collect_tasks:nww #1#2 \end #3
+  {
+    \tl_put_right:Nn \l__tasks_body_tl { #1 }
+    \end { #3 }
+    \tl_if_eq:nnF { #1 } { #3 }
+      { \__tasks_collect_tasks:nww { #1 } }
+  }
+
+%  #1: instance
+%  #2: number of columns
+%  #3: item separator
+%  #4: environment body
+\cs_new_protected:Npn \__tasks:nnnn #1#2#3#4
+  {
+    \bool_if:NT \l__tasks_debug_bool { \dim_set:Nn \fboxsep {0pt} }
+    \seq_set_split:Nnn \l__tasks_seq { #3 } { #4 }
+    % remove the first (empty) item:
+    \seq_pop_left:NN \l__tasks_seq \l__tasks_tmpa_tl
+    \tl_if_blank:VF \l__tasks_tmpa_tl { \@noitemerr }
+    \int_gset:Nn \g__tasks_total_items_int
+      { \seq_count:N \l__tasks_seq }
+    \UseInstance { tasks } { #1 }
+      { \g__tasks_total_items_int }
+      { #2 }
+      { \l__tasks_custom_label_pattern_tl }
+    % just to be sure:
+    \seq_clear:N \l__tasks_seq
+  }
+\cs_generate_variant:Nn \__tasks:nnnn { VnnV }
+
+\cs_new_protected:Npn \__tasks_task:nnwwwwww #1#2[#3,#4][#5,#6](#7,#8)
+  {
+    % start a new item line if \l__tasks_item_full_line_bool
+    \bool_if:NT \l__tasks_item_full_line_bool
+      {
+        % add skip if we were in the middle of a line, i.e., in horizontal
+        % mode:
+        \mode_if_horizontal:T
+          { \skip_vertical:N \l__tasks_after_item_skip }
+        \tasks_new_row:
+      }
+    \int_gincr:N \g__tasks_current_col_num_int
+    \dim_set:Nn \l__tasks_item_width_dim
+      {
+        \bool_if:NTF \l__tasks_item_full_line_bool
+          { \linewidth }
+          {
+            (
+              \linewidth
+              - \l__tasks_columns_int \l__tasks_column_sep_dim
+              + \l__tasks_column_sep_dim
+            ) / \l__tasks_columns_int
+          }
+        - \l__tasks_depth_int \l__tasks_item_indent_dim
+        \bool_if:NT \l__tasks_debug_bool { -2\fboxrule }
+      }
+    \__tasks_gset_rows_num:NN
+      \g__tasks_total_items_int
+      \l__tasks_columns_int
+    % set \g__tasks_current_col_num_int to 1 if at the start of a row,
+    % the also step \g__tasks_current_row_num_int :
+    \int_compare:nNnT { \g__tasks_current_col_num_int } > { \l__tasks_columns_int }
+      {
+        \int_gset:Nn \g__tasks_current_col_num_int { 1 }
+        \int_incr:N \g__tasks_current_row_num_int
+      }
+    \bool_if:NT \l__tasks_item_rest_of_line_bool
+      {
+        \int_compare:nNnTF { \l__tasks_item_columns_int } = { 0 }
+          {
+            \int_set:Nn \l__tasks_tmpa_int
+              { \l__tasks_columns_int - \g__tasks_current_col_num_int + 1 }
+            \int_set:Nn \l__tasks_tmpb_int { \l__tasks_tmpa_int -1 }
+          }
+          {
+            \int_set:Nn \l__tasks_tmpa_int
+              { \l__tasks_columns_int - \g__tasks_current_col_num_int + 1 }
+            \int_compare:nNnTF
+              { \l__tasks_tmpa_int } > { \l__tasks_item_columns_int }
+              { \int_set_eq:NN \l__tasks_tmpa_int \l__tasks_item_columns_int }
+              { \int_zero:N \l__tasks_item_columns_int }
+            \bool_if:nT
+              {
+                \l__tasks_item_rest_of_line_bool &&
+                !\int_compare_p:nNn { \l__tasks_item_columns_int} = { 0 }
+              }
+              {
+                \int_gadd:Nn \g__tasks_current_col_num_int
+                  { \l__tasks_item_columns_int -1 }
+                \int_gadd:Nn \g__tasks_total_items_int
+                  { \l__tasks_item_columns_int -1 }
+              }
+            \int_set:Nn \l__tasks_tmpb_int { \l__tasks_tmpa_int -1 }
+          }
+        \dim_set:Nn \l__tasks_item_width_dim
+          {
+            \l__tasks_tmpa_int \l__tasks_item_width_dim
+            + \l__tasks_tmpb_int \l__tasks_column_sep_dim
+            + \l__tasks_tmpb_int \l__tasks_item_indent_dim
+            \bool_if:NT \l__tasks_debug_bool
+              { + \int_eval:n { \l__tasks_tmpb_int * 2 } \fboxrule }
+          }
+      }
+    % set the item box:
+    \hcoffin_set:Nn \l__tasks_item_coffin
+      {
+        \vcoffin_set:Nnn \l__tasks_tmpa_coffin
+          { \l__tasks_item_width_dim }
+          { \__tasks_setup: #2 }
+        \__tasks_debug:n
+          {
+            \coffin_typeset:Nnnnn \l__tasks_tmpa_coffin
+              { l } { T } { 0pt } { 0pt }
+          }
+      }
+    % set the label box:
+    \hcoffin_set:Nn \l__tasks_label_coffin
+      {
+        \vcoffin_set:Nnn \l__tasks_tmpa_coffin
+          {
+            \l__tasks_label_width_dim
+            \bool_if:NT \l__tasks_debug_bool {-2\fboxrule }
+          }
+          {
+            \noindent
+            \tl_use:N \l__tasks_item_fill_left_tl
+            \strut #1
+            \tl_use:N \l__tasks_item_fill_right_tl
+          }
+        \__tasks_debug:n
+          {
+            \coffin_typeset:Nnnnn \l__tasks_tmpa_coffin
+              { l } { T } { 0pt } { 0pt }
+          }
+      }
+    % attach the label box at the left of the item box, shifted by
+    % \l__tasks_label_offset_dim :
+    \coffin_attach:NnnNnnnn
+      \l__tasks_item_coffin { l } { T }
+      \l__tasks_label_coffin { r } { T }
+      { - \l__tasks_label_offset_dim
+        % - \l__tasks_label_width_dim - \l__tasks_label_offset_dim
+      } { 0pt }
+    % when a new row starts enter vertical mode:
+    \int_compare:nNnT { \g__tasks_current_col_num_int } = { 1 }
+      { \skip_vertical:N \c_zero_skip }
+    % skip horizontally by \l__tasks_item_indent_dim
+    \noindent
+    \skip_horizontal:N \l__tasks_item_indent_dim
+    % typeset the item (with the attached label protruding to the left):
+    \coffin_typeset:Nnnnn \l__tasks_item_coffin
+      { l } { T } { 0pt } { 0pt }
+    \bool_if:nT
+      {
+        \l__tasks_item_full_line_bool ||
+        (
+          \l__tasks_item_rest_of_line_bool &&
+          \int_compare_p:nNn { \l__tasks_item_columns_int } = { 0 }
+        )
+      }
+      { \tasks_new_row: }
+    % are we between items in a row? The skip by \l__tasks_column_sep_dim :
+    \int_compare:nNnT
+      { \g__tasks_current_col_num_int } < { \l__tasks_columns_int }
+      { \skip_horizontal:N \l__tasks_column_sep_dim }
+    % if we ended a row and a new row is still to come skip vertically by
+    % \l__tasks_after_item_skip :
+    \bool_if:nT
+      {
+        ( \int_compare_p:nNn { \g__tasks_current_col_num_int } = { \l__tasks_columns_int } )
+        &&
+        ( \int_compare_p:n { \g__tasks_current_row_num_int != \l__tasks_rows_int } )
+      }
+      { \skip_vertical:N \l__tasks_after_item_skip }
+    % clean up:
+    \coffin_clear:N \l__tasks_item_coffin
+    \coffin_clear:N \l__tasks_label_coffin
+    \coffin_clear:N \l__tasks_tmpa_coffin
+    \bool_set_false:N \l__tasks_item_full_line_bool
+    \bool_set_false:N \l__tasks_item_rest_of_line_bool
+  }
+\cs_generate_variant:Nn \__tasks_task:nnwwwwww { VV }
+
+\cs_new_protected:Npn \__tasks_setup:
+  {
+    \dim_set:Nn \parskip { 0pt }
+    \skip_set:Nn \parfillskip { 0pt plus 1fil }
+    \dim_set_eq:NN \parskip \parsep
+    \dim_set_eq:NN \parindent \listparindent
+    \noindent
+    \strut
+  }
+
+\cs_new_protected:Npn \__tasks_gset_rows_num:NN #1#2
+  {
+    \int_gset:Nn \l__tasks_rows_int { \int_div_truncate:nn { #1 } { #2 } }
+    \int_compare:nNnT { \int_mod:nn { #1 } { #2 } } > { 0 }
+      { \int_gincr:N \l__tasks_rows_int }
+  }
+
+\cs_new_protected:Npn \__tasks_label_align:n #1
+  {
+    \clist_if_in:nnTF { left , center , right } { #1 }
+      {
+        \tl_if_eq:nnT { #1 } { left }
+          {
+            \tl_clear:N   \l__tasks_item_fill_left_tl
+            \tl_set_eq:NN \l__tasks_item_fill_right_tl \hfill
+          }
+        \tl_if_eq:nnT { #1 } { right }
+          {
+            \tl_set_eq:NN \l__tasks_item_fill_left_tl \hfill
+            \tl_clear:N   \l__tasks_item_fill_right_tl
+          }
+        \tl_if_eq:nnT { #1 } { center }
+          {
+            \tl_set_eq:NN \l__tasks_item_fill_left_tl  \hfill
+            \tl_set_eq:NN \l__tasks_item_fill_right_tl \hfill
+          }
+      }
+      {
+        \tl_clear:N   \l__tasks_item_fill_left_tl
+        \tl_set_eq:NN \l__tasks_item_fill_right_tl \hfill
+      }
+  }
+\cs_generate_variant:Nn \__tasks_label_align:n { V }
+\__tasks_label_align:n { left }
+
+% --------------------------------------------------------------------------
+% the `tasks' object:
+%   #1: number of items
+%   #2: number of columns
+%   #3: label-format
+\DeclareObjectType { tasks } { 3 }
+% the `default' template interface:
+\DeclareTemplateInterface { tasks } { default } { 3 }
+  {
+    enumerate       : boolean   = true    ,
+    label           : tokenlist           ,
+    indent          : length    = 2.5em   ,
+    counter-format  : tokenlist = tsk[a]) ,
+    label-format    : tokenlist ,
+    label-width     : length    = 1em     ,
+    label-offset    : length    = .3333em ,
+    after-item-skip : skip      = 1ex plus 1ex minus 1ex
+  }
+
+% in the next three commands we want a really unlikely to occur marker; for
+% this we use $ with unusual catcode in ``$tasks$default$label$'':
+\cs_set:Nx \__tasks_restore_dollar:
+  { \char_set_catcode:nn {36} { \char_value_catcode:n {36} } }
+\char_set_catcode_alignment:N \$
+
+% the `default' template code:
+\DeclareTemplateCode { tasks } { default } { 3 }
+  {
+    enumerate       = \l__tasks_enumerate_bool           ,
+    label           = \l__tasks_label_tl                 ,
+    indent          = \l__tasks_item_default_indent_dim  ,
+    counter-format  = \l__tasks_label_pattern_tl         ,
+    label-format    = \l__tasks_label_format_tl          ,
+    label-width     = \l__tasks_label_default_width_dim  ,
+    label-offset    = \l__tasks_label_default_offset_dim ,
+    after-item-skip = \l__tasks_after_item_skip
+  }
+  {
+    \AssignTemplateKeys
+    \bool_if:NF \l__tasks_label_width_bool
+      {
+        \dim_set_eq:NN
+          \l__tasks_label_width_dim
+          \l__tasks_label_default_width_dim
+      }
+    \bool_if:NF \l__tasks_item_indent_bool
+      {
+        \dim_set_eq:NN
+          \l__tasks_item_indent_dim
+          \l__tasks_item_default_indent_dim
+      }
+    \bool_if:NF \l__tasks_label_offset_bool
+      {
+        \dim_set_eq:NN
+          \l__tasks_label_offset_dim
+          \l__tasks_label_default_offset_dim
+      }
+    \dim_compare:nNnT
+      { \l__tasks_item_indent_dim }
+       <
+      { \l__tasks_label_offset_dim + \l__tasks_label_width_dim }
+      {
+        \dim_set:Nn \l__tasks_item_indent_dim
+          { \l__tasks_label_offset_dim + \l__tasks_label_width_dim }
+      }
+    \bool_if:NT \l__tasks_custom_after_item_skip_bool
+      {
+        \skip_set_eq:NN
+          \l__tasks_after_item_skip
+          \l__tasks_custom_after_item_skip
+      }
+    \bool_if:NT \l__tasks_custom_label_bool
+      {
+        \tl_set_eq:NN
+          \l__tasks_label_tl
+          \l__tasks_custom_label_tl
+        \bool_set_false:N \l__tasks_enumerate_bool
+      }
+    \__tasks_label_align:V \l__tasks_label_align_tl
+    % need this for enumerate list:
+    \bool_if:nT { !\l__tasks_resume_bool && \l__tasks_enumerate_bool }
+      { \int_gzero:N \g__tasks_int }
+    \int_set:Nn \l__tasks_columns_int { #2 }
+    % set all the items in their own coffins and join with the ground:
+    \int_gzero:N \g__tasks_current_col_num_int
+    \int_set:Nn \g__tasks_current_row_num_int { 1 }
+    \tl_if_blank:VF \l__tasks_custom_label_pattern_tl
+      {
+        \tl_set_eq:NN
+          \l__tasks_label_pattern_tl
+          \l__tasks_custom_label_pattern_tl
+      }
+    \tl_if_blank:VF \l__tasks_custom_label_format_tl
+      {
+        \tl_set_eq:NN
+          \l__tasks_label_format_tl
+          \l__tasks_custom_label_format_tl
+      }
+    \seq_map_inline:Nn \l__tasks_seq
+      {
+        \__tasks_read_item:www ##1 \q_stop
+        \bool_if:NTF \l__tasks_enumerate_bool
+          {
+            \tl_if_eq:VnT \l__tasks_tmp_label_tl { $tasks$default$label$ }
+              {
+                \int_gincr:N \g__tasks_int
+                \SaveCounterPatternFrom [ tasks ]
+                  \l__tasks_tmpa_tl
+                  \l__tasks_label_tl
+                  \l__tasks_label_pattern_tl
+                \cs_gset:Npx \@currentlabel { \l__tasks_label_tl }
+              }
+          }
+          {
+            \tl_if_blank:VT \l__tasks_label_tl
+              { \tl_set_eq:NN \l__tasks_label_tl \labelitemi }
+          }
+        \tl_put_left:NV \l__tasks_label_tl \l__tasks_label_format_tl
+        \tl_if_eq:VnTF \l__tasks_tmp_label_tl { $tasks$default$label$ }
+          {
+            \__tasks_task:VVwwwwww
+              \l__tasks_label_tl
+              \l__tasks_item_tl
+              [ l , b ] [ l , t ] ( 0pt , 0pt )
+          }
+          {
+            \__tasks_task:VVwwwwww
+              \l__tasks_tmp_label_tl
+              \l__tasks_item_tl
+              [ l , b ] [ l , t ] ( 0pt , 0pt )
+            \tl_clear:N \l__tasks_tmp_label_tl
+          }
+      }
+  }
+
+\cs_new_protected:Npn \__tasks_read_item:www
+  {
+    \peek_meaning_remove:NTF !
+      {
+        \bool_set_true:N \l__tasks_item_full_line_bool
+        \__tasks_read_item_aux:ww
+      }
+      {
+        \peek_meaning_remove:NTF *
+          {
+            \bool_set_true:N \l__tasks_item_rest_of_line_bool
+            \__tasks_read_item_rest_of_line:ww
+          }
+          { \__tasks_read_item_aux:ww }
+      }
+  }
+
+\cs_new_protected:Npn \__tasks_read_item_rest_of_line:ww
+  {
+    \peek_meaning:NTF ( % )
+      { \__tasks_read_item_rest_of_line_aux:ww }
+      { \__tasks_read_item_rest_of_line_aux:ww (0) }
+  }
+
+\cs_new_protected:Npn \__tasks_read_item_rest_of_line_aux:ww (#1)
+  {
+    \int_set:Nn \l__tasks_item_columns_int {#1}
+    \__tasks_read_item_aux:ww
+  }
+
+\cs_new_protected:Npn \__tasks_read_item_aux:ww
+  {
+    \peek_meaning:NTF [ % ]
+      { \__tasks_read_item_aux_ii:ww }
+      { \__tasks_read_item_aux_ii:ww [$tasks$default$label$] }
+  }
+
+\cs_new_protected:Npn \__tasks_read_item_aux_ii:ww [#1]#2 \q_stop
+  {
+    \tl_set:Nn \l__tasks_tmp_label_tl { #1 }
+    \tl_if_eq:nnF { #1 } { $tasks$default$label$ }
+      { \tl_put_left:NV \l__tasks_tmp_label_tl \l__tasks_label_format_tl }
+    \tl_set:Nn \l__tasks_item_tl { \ignorespaces #2 }
+  }
+
+\__tasks_restore_dollar:
+
+% --------------------------------------------------------------------------
+% choice box:
+\bool_new:N \l__tasks_choice_checked_bool
+\dim_new:N  \l__tasks_choice_width_dim
+\dim_set:Nn \l__tasks_choice_width_dim { 1.25ex }
+\dim_new:N  \l__tasks_choice_linewidth_dim
+\dim_set:Nn \l__tasks_choice_linewidth_dim { .3pt }
+\dim_new:N  \l__tasks_choice_checkwidth_dim
+\dim_set:Nn \l__tasks_choice_checkwidth_dim { .5pt }
+\dim_new:N  \l__tasks_choice_raise_dim
+\dim_set:Nn \l__tasks_choice_raise_dim { .1ex }
+
+\cs_new_protected:Npn \tasks_choice:
+  {
+    \leavevmode
+    \group_begin:
+      \bool_set_false:N \l__tasks_choice_checked_bool
+      \box_move_up:nn
+        { \l__tasks_choice_raise_dim }
+        { \hbox:n { \__tasks_choice: } }
+    \group_end:
+  }
+
+\cs_new_protected:Npn \tasks_choice_checked:
+  {
+    \leavevmode
+    \group_begin:
+      \bool_set_true:N \l__tasks_choice_checked_bool
+      \box_move_up:nn
+        { \l__tasks_choice_raise_dim }
+        { \hbox:n { \__tasks_choice: } }
+    \group_end:
+  }
+
+\cs_new_protected:Npn \__tasks_choice:
+  {%
+    \dim_set:Nn \unitlength { .1\l__tasks_choice_width_dim }
+    \begin{picture}(10,0)
+      \linethickness \l__tasks_choice_linewidth_dim
+      \drawline(0,0)(0,10)(10,10)(10,0)(0,0)
+      \linethickness \l__tasks_choice_checkwidth_dim
+      \bool_if:NT \l__tasks_choice_checked_bool
+        {
+          \drawline(2,2)(8,8)
+          \drawline(2,8)(8,2)
+        }
+    \end{picture}%
+  }
+
+\providecommand* \choicebox { \tasks_choice: }
+\providecommand* \checkedchoicebox { \tasks_choice_checked: }
+
+% --------------------------------------------------------------------------
+% base instance:
+% ALPHABETIZE: a) b) c)
+\DeclareInstance { tasks } { alphabetize } { default } { }
+
+\keys_define:nn { tasks / list }
+  {
+    debug           .bool_set:N = \l__tasks_debug_bool ,
+    style           .tl_set:N   = \l__tasks_instance_tl ,
+    counter-format  .tl_set:N   = \l__tasks_custom_label_pattern_tl ,
+    label           .code:n     =
+      \bool_set_true:N \l__tasks_custom_label_bool
+      \tl_set:Nn \l__tasks_custom_label_tl { #1 } ,
+    label-format    .tl_set:N   = \l__tasks_custom_label_format_tl ,
+    label-width     .code:n     =
+      \dim_set:Nn \l__tasks_label_width_dim { #1 }
+      \bool_set_true:N \l__tasks_label_width_bool ,
+    label-offset    .code:n     =
+      \dim_set:Nn \l__tasks_label_offset_dim { #1 }
+      \bool_set_true:N \l__tasks_label_offset_bool ,
+    label-align     .tl_set:N   = \l__tasks_label_align_tl ,
+    item-indent     .code:n     =
+      \dim_set:Nn \l__tasks_item_indent_dim { #1 }
+      \bool_set_true:N \l__tasks_item_indent_bool ,
+    columns-sep     .dim_set:N  = \l__tasks_column_sep_dim ,
+    before-skip     .skip_set:N = \l__tasks_before_list_skip ,
+    after-skip      .skip_set:N = \l__tasks_after_list_skip ,
+    after-item-skip .code:n     =
+      \bool_set_true:N \l__tasks_custom_after_item_skip_bool
+      \skip_set:Nn \l__tasks_custom_after_item_skip { #1 } ,
+    resume          .bool_set:N = \l__tasks_resume_bool
+  }
+
+% --------------------------------------------------------------------------
+% the generic environment:
+\NewEnviron { __tasks_env: } [ 3 ]
+  {
+    \keys_set:nn { tasks / list } { #2 }
+    \tl_if_blank:VT \l__tasks_instance_tl
+      { \keys_set:nn { tasks / list } { style = alphabetize } }
+    \skip_vertical:N \l__tasks_before_list_skip
+    \skip_vertical:N \c_zero_skip
+    \list {}
+      {
+        \dim_set:Nn \leftmargin { 0pt }
+        \dim_set:Nn \rightmargin { 0pt }
+      }
+    \item \scan_stop:
+    \int_incr:N \l__tasks_depth_int
+    \__tasks:VnnV \l__tasks_instance_tl { #3 } { #1 } \BODY
+    \endlist
+    \skip_vertical:N \l__tasks_after_list_skip
+  }
+
+% --------------------------------------------------------------------------
+% command to start a new row:
+\cs_new_protected:Npn \tasks_new_row:
+  {
+    \int_gset:Nn \g__tasks_total_items_int
+      { \g__tasks_total_items_int + \l__tasks_columns_int - \g__tasks_current_col_num_int }
+    \__tasks_gset_rows_num:NN
+      \g__tasks_total_items_int
+      \l__tasks_columns_int
+    \int_gset_eq:NN \g__tasks_current_col_num_int \l__tasks_columns_int
+  }
+
+\NewDocumentCommand \startnewitemline {}
+  { \tasks_new_row: }
+
+% --------------------------------------------------------------------------
+% the user environment:
+\NewDocumentCommand \NewTasks { O{}mO{\task}D(){1} }
+  {
+    \NewDocumentEnvironment { #2 } { O{}D(){#4} }
+      { \__tasks_env: { #3 } { #1,##1 } { ##2 } }
+      { \end__tasks_env: }
+  }
+
+\NewDocumentCommand \RenewTasks { O{}mO{\task}D(){1} }
+  {
+    \RenewDocumentEnvironment { #2 } { O{}D(){#4} }
+      { \__tasks_env: { #3 } { #1,##1 } { ##2 } }
+      { \end__tasks_env: }
+  }
+
+% --------------------------------------------------------------------------
+% default list:
+\NewTasks { tasks }
+
+% --------------------------------------------------------------------------
+% package options:
+\keys_define:nn { tasks / options }
+  {
+    more .code:n = \msg_warning:nnn {tasks} {deprecated-option} {more}
+  }
+
+\ProcessKeysOptions { tasks / options }
+
+\cs_if_exist:NF \tasks_config_file_loaded:
+  { \file_input:n { tasks.cfg } }
+
+% --------------------------------------------------------------------------
+% setup:
+\cs_new_protected:Npn \tasks_setup:n #1
+  { \keys_set:nn { tasks / list } { #1 } }
+
+\NewDocumentCommand \settasks { m }
+  { \tasks_setup:n { #1 } }
+
+% --------------------------------------------------------------------------
+\tex_endinput:D
+
+% HISTORY:
+2013/01/19 v0.7   - extracted from `exsheets' package; this also lead to a
+                    slightly new syntax and a few new options for it
+2013/04/04 v0.8a  - corrected \seq_length:N => \seq_count:N
+2013/04/07 v0.9   - protected internal commands where appropriate
+                  - made enumerated item referenceable with \label{}
+                    and \ref{}; this introduced new options:
+                     * the former `label-format' is now `counter-format'
+                     * new: `label-format'
+                  - changed defaults for `label-width' and `label-offset'
+                  - ensure that the `after-item-skip' is only
+                          inserted in between rows
+                  - new option `after-item-skip'
+                  - improvements when label are set with optional argument:
+                     * a provided but empty argument is now correctly recognized
+                     * the counter is  _not_ stepped anymore for enumerated
+                       lists when the optional argument is provided
+                  - new command \startnewitemline that forces the next item to
+                    be put at the beginning of a row
+2013/04/22 v0.9a  - new option `item-indent'
+                  - synchronized version number with `exsheets' until now but
+                    won't any more
+2013/12/03 v0.9b  - add missing \noindent for the case when \listparindent is
+                    non-zero, fixes http://tex.stackexchange.com/q/148082/5049
+2014/05/11 v0.9c  - remove definition of the \task macro: it is not necessary
+                    for `tasks' to function but it conflicts e.g. with `ltxdoc'
+                    class
+2014/07/11 v0.20  - new option `debug'
+                  - new option `column-sep
+                  - renamed a few internal variables
+                  - remove package from the `exsheets' bundle and distribute
+                    it as package of its own
+                  - new: optional bang to a \task forces an item to use a full
+                    line (\task!)
+                  - new: optional star to a \task forces an item to use the
+                    complete remaining line (\task*); the star has itself has
+                    an optional argument for specifying the number of columns
+                    to span (\task*(<num>))
diff --git a/Master/tlpkg/bin/tlpkg-ctan-check b/Master/tlpkg/bin/tlpkg-ctan-check
index bccf1039be9..eb0f9bc409e 100755
--- a/Master/tlpkg/bin/tlpkg-ctan-check
+++ b/Master/tlpkg/bin/tlpkg-ctan-check
@@ -471,7 +471,7 @@ my @TLP_working = qw(
     tabriz-thesis tabstackengine tabto-generic tabto-ltx
     tabu tabularborder tabularcalc tabularew
     tabulars-e tabulary tabvar tagging talk tamefloats
-    tamethebeast tap tapir tcldoc tcolorbox tdclock tdsfrmath
+    tamethebeast tap tapir tasks tcldoc tcolorbox tdclock tdsfrmath
     technics ted templates-fenn templates-sommer templatetools tengwarscript
     tensor termcal termlist testhyphens teubner
     tex-ewd tex-font-errors-cheatsheet tex-gyre tex-gyre-math
diff --git a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
index 3d9227af067..8696bba162d 100644
--- a/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
+++ b/Master/tlpkg/tlpsrc/collection-latexextra.tlpsrc
@@ -826,6 +826,7 @@ depend tabulary
 depend tagging
 depend talk
 depend tamefloats
+depend tasks
 depend tcldoc
 depend tcolorbox
 depend tdclock
diff --git a/Master/tlpkg/tlpsrc/tasks.tlpsrc b/Master/tlpkg/tlpsrc/tasks.tlpsrc
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/Master/tlpkg/tlpsrc/tasks.tlpsrc