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diff --git a/presentations/taler-mdb-36c3/.template/sty/collectbox.sty b/presentations/taler-mdb-36c3/.template/sty/collectbox.sty
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+%%
+%% This is file `collectbox.sty',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% collectbox.dtx  (with options: `collectbox.sty')
+%% 
+%% IMPORTANT NOTICE:
+%% 
+%% For the copyright see the source file.
+%% 
+%% Any modified versions of this file must be renamed
+%% with new filenames distinct from collectbox.sty.
+%% 
+%% For distribution of the original source see the terms
+%% for copying and modification in the file collectbox.dtx.
+%% 
+%% This generated file may be distributed as long as the
+%% original source files, as listed above, are part of the
+%% same distribution. (The sources need not necessarily be
+%% in the same archive or directory.)
+%% Copyright (C) 2012 by Martin Scharrer <martin@scharrer-online.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 `maintained'.
+%%
+%% The Current Maintainer of this work is Martin Scharrer.
+%%
+%% This work consists of the files collectbox.dtx and collectbox.ins
+%% and the derived filebase collectbox.sty.
+%%
+\NeedsTeXFormat{LaTeX2e}[1999/12/01]
+\ProvidesPackage{collectbox}[%
+    2012/05/17
+    v0.4b
+    Collect macro arguments as boxes]
+\newsavebox\collectedbox
+\newcommand*\collectbox{%
+    \@ifstar
+        {\collectbox@a{{\BOXCONTENT}}}%
+        {\collectbox@a{}}%
+}
+\long\def\collectbox@a#1{%
+    \@ifnextchar[%
+        {\collectbox@b{#1}}%
+        {\collectbox@b{#1}[]}%
+}
+\long\def\collectbox@b#1[#2]#3{%
+    \@ifnextchar[%
+        {\collectbox@c{#2}{#3#1}}%
+        {\collectbox@c{#2}{#3#1}[]}%
+}
+\long\def\collectbox@c#1#2[#3]{%
+    \collectbox@{#1}{#2}{#3}%
+}
+\let\collect@box\hbox
+\let\collectbox@mode\leavevmode
+\newcommand\collectbox@[3]{%
+    \begingroup
+    \collectbox@mode
+    \@temptokena{#3\collectbox@end#2\endgroup}%
+    \setbox\collectedbox\collect@box\bgroup
+       \collectbox@setgroup
+       #1\bgroup
+       \aftergroup\the
+       \aftergroup\@temptokena
+       \collectbox@bgroup
+}
+\let\collectbox@macro\collectbox@
+\newcommand\collectbox@env[3]{%
+    \collectbox@mode
+    \def\collectboxenvend{#3\collectbox@end#2\collectbox@currenvir}%
+    \setbox\collectedbox\collect@box\bgroup
+       \collectbox@setgroup
+       \collectbox@reset
+       \ignorespaces
+       #1%
+}
+\def\collectbox@currenvir{%
+    \edef\@currenvir{\@currenvir}%
+}
+\def\collectbox@macro@bgroup{%
+    \@ifnextchar\bgroup
+        {\let\@let@token=}%
+        {\collectbox@arg}%
+}
+\def\collectbox@env@bgroup{%
+    \collectbox@reset
+    \ignorespaces
+}
+\let\collectbox@bgroup\collectbox@macro@bgroup
+\def\collectbox@setgroup{%
+    \color@setgroup
+}
+\def\collectbox@endgroup{%
+    \collectbox@endcode
+    \color@endgroup
+}
+\let\collectbox@endcode\relax
+\newcommand\@collectbox[1]{%
+    \begingroup
+    \collectbox@mode
+    \@temptokena{\collectbox@end#1\endgroup}%
+    \setbox\collectedbox\collect@box\bgroup
+       \collectbox@setgroup\bgroup
+       \aftergroup\the
+       \aftergroup\@temptokena
+       \collectbox@bgroup
+}
+\newcommand\@Collectbox[2]{%
+    \begingroup
+    \collectbox@mode
+    \sbox\collectedbox{#2}%
+    \collectbox@setdims
+    #1%
+    \endgroup
+}
+\def\collectbox@arg#1{%
+    #1\egroup
+}
+\def\collectbox@end{%
+    \collectbox@endgroup
+    \egroup
+    \collectbox@setdims
+    \ifcollectboxenv
+        \collectbox@reset
+        \collectbox@currenvir
+    \fi
+}
+\def\collectbox@setdims{%
+    \collectbox@protecteddef\BOXCONTENT{\usebox\collectedbox}%
+    \collectbox@protecteddef\width{\wd\collectedbox}%
+    \collectbox@protecteddef\height{\ht\collectedbox}%
+    \collectbox@protecteddef\depth{\dp\collectedbox}%
+    \collectbox@protecteddef\totalheight{\@ovri}%
+    \totalheight\height
+    \advance\totalheight\depth
+}%
+\def\collectbox@reset{%
+    \let\collectbox@endcode\relax
+    \let\collectbox@bgroup\collectbox@macro@bgroup
+    \let\collectbox@\collectbox@macro
+    \collectboxenvfalse
+}
+\begingroup
+\expandafter\ifx\csname protected\endcsname\relax
+    \let\collectbox@protecteddef\def%
+\else
+    \gdef\collectbox@protecteddef{\protected\def}%
+\fi
+\endgroup
+\let\collectbox@code\empty
+\newcommand\collectboxto[1]{%
+    \@ifnextchar[%
+        {\collectboxto@a{#1}}%
+        {\collectboxto@a{#1}[]}%
+}
+\long\def\collectboxto@a#1[#2]#3{%
+    \@ifnextchar[%
+        {\collectboxto@b{#1}{#2}{#3}}%
+        {\collectboxto@b{#1}{#2}{#3}[]}%
+}
+\long\def\collectboxto@b#1#2#3[#4]{%
+    \collectboxto@{#1}{#2}{#3}{#4}%
+}
+\newcommand\collectboxto@[4]{%
+    \collectbox@mode
+    \setbox#1\collect@box\bgroup
+       \def\collectbox@code{#4\collectbox@endgroup\egroup#3}%
+       \collectbox@setgroup#2\bgroup
+       \aftergroup\collectbox@code
+       \collectbox@bgroup
+}
+\newcommand\@collectboxto[2]{%
+    \collectbox@mode
+    \setbox#1\collect@box\bgroup
+       \def\collectbox@code{\collectbox@endgroup\egroup#2}%
+       \collectbox@setgroup\bgroup
+       \aftergroup\collectbox@code
+       \collectbox@bgroup
+}
+\newcommand\nocollectbox@[3]{%
+    \collectbox@mode
+    \collect@box\bgroup
+       \def\collectbox@code{#3\egroup#2}%
+       #1\bgroup
+       \aftergroup\collectbox@code
+       \collectbox@bgroup
+}
+\newcommand\nocollectbox@to[4]{%
+    \collectbox@mode
+    \collect@box to #1\bgroup
+       \def\collectbox@code{#4\egroup#3}%
+       #2\bgroup
+       \aftergroup\collectbox@code
+       \collectbox@bgroup
+}
+\newcommand*\collectboxcheckenv[1]{%
+    \begingroup
+    \def\@tempa{#1}%
+    \expandafter\endgroup
+    \ifx\@currenvir\@tempa
+        \@collectboxisenv{#1}%
+    \fi
+}
+\def\@collectboxisenv#1{%
+    \collectbox@noindent
+    \collectboxenvtrue
+    \edef\@currenvir{\@currenvir\noexpand\empty}%
+    \let\collectbox@bgroup\collectbox@env@bgroup
+    \let\collectbox@endcode\collectbox@env@endcode
+    \let\collectbox@\collectbox@env
+    \expandafter\ifx\csname end#1\endcsname\relax
+        \expandafter\let\csname end#1\endcsname\collectbox@envend
+    \fi
+}
+\newif\ifcollectboxenv
+\let\collectbox@noindent\noindent
+\def\collectbox@env@endcode{\ifhmode\unskip\fi}%
+\def\collectbox@envend{\collectboxenvend}%
+\def\collectboxenvend{%
+    \egroup
+    \collectbox@currenvir
+}%
+\newcommand\collectboxtabular[3][c]{%
+    \collectbox@tab{tabular}{[#1]{#2}}{}{#3}{}%
+}
+\newcommand\collectboxtabularstar[4][c]{%
+    \collectbox@tab{tabular*}{[#1]{#2}{#3}}{}{#4}{}%
+}
+\newcommand\collectboxarray[2]{%
+    \collectbox@tab{array}{{#1}}{\(}{#2}{\)}%
+}
+\def\collectbox@checkarray{%
+\@ifpackageloaded{array}{%
+    \let\collectbox@realarraycr\@arraycr
+    \def\collectbox@setarraycr{%
+        \let\@arraycr\collebox@cr
+        \def\ialign{\let\@arraycr\collectbox@realarraycr \everycr {}\tabskip \z@skip \halign}%
+    }%
+}{%
+    \let\collectbox@realarraycr\@tabularcr
+    \def\collectbox@setarraycr{%
+        \let\@tabularcr\collebox@cr
+        \def\ialign{\let\noexpand\@tabularcr\noexpand\collectbox@realarraycr \everycr {}\tabskip \z@skip \halign}%
+    }%
+}%
+}
+\collectbox@checkarray
+\AtBeginDocument{\collectbox@checkarray}%
+\def\collectbox@dorealarraycr{%
+    \expandafter\collectbox@realarraycr\collectbox@aftercrstuff
+}
+\let\collectbox@aftercrstuff\empty
+\def\collectbox@tab#1#2#3#4#5{%
+    \begingroup
+    \collectbox@mode
+    \def\collectbox@codeafter{#4\endgroup}%
+    \def\collectbox@endtabenv{\end{#1}#5\collectbox@end}%
+    \def\collectbox@dotab{#3\begin{#1}#2}%
+    \setbox\collectedbox\collect@box\bgroup
+       \collectbox@setgroup
+       \collectbox@setarraycr
+       \afterassignment\collectbox@dotab
+       \let\@let@token=%
+}
+\def\collebox@cr{%
+    \@ifstar\collebox@@cr\collebox@@cr%
+}
+\def\collebox@@cr{%
+    \@ifnextchar[%
+        \collebox@@cr@opt
+        {\collebox@@@cr{}}%
+}
+\def\collebox@@cr@opt[#1]{%
+    \collebox@@@cr{[#1]}%
+}
+\def\collebox@@@cr#1{%
+    \def\collectbox@aftercrstuff{#1}%
+    \expandafter\collebox@@@@cr
+    \romannumeral-`0%
+}
+\def\collebox@@@@cr{%
+    \@ifnextchar\egroup{\collectbox@dorealarraycr\collectbox@aftertab}{%
+        \ifx\@let@token\noalign
+            \expandafter\collectbox@handlenoalign
+        \else
+            \expandafter\collectbox@dorealarraycr
+        \fi
+    }%
+}
+\def\collectbox@handlenoalign#1#2{%
+    \collectbox@dorealarraycr
+    \noalign{\bgroup\aftergroup\collectbox@afternoalign#2}%
+}
+\def\collectbox@handlenextnoalign#1#2{%
+    \egroup
+    \noalign{\bgroup\aftergroup\collectbox@afternoalign#2}%
+}
+\def\collectbox@afternoalign{%
+    \expandafter\collectbox@@afternoalign
+    \romannumeral-`0%
+}
+\def\collectbox@@afternoalign{%
+    \@ifnextchar\egroup{\egroup\collectbox@aftertab}{%
+        \ifx\@let@token\noalign
+            \expandafter\collectbox@handlenextnoalign
+        \else
+            \expandafter\egroup
+        \fi
+    }%
+}
+\def\collectbox@aftertab{%
+    \collectbox@endtabenv
+    \afterassignment\collectbox@codeafter
+    \let\@let@token=%
+}
+\endinput
+%%
+%% End of file `collectbox.sty'.