Use LuaLaTeX

Use LuaLaTeX instead of pdfLaTeX to build the slides.  This fixes knowsys#5.
Use latexmk instead of relying on two runs sufficing to build the documents.

Vorlesungen/beamerouterthemetud.sty

@@ -31,6 +31,7 @@
 \ProcessOptionsBeamer\relax
 
 \RequirePackage{calc}
+\RequirePackage{ifluatex}
 
 % Templates
 
@@ -130,9 +131,11 @@
 \newcommand*{\inserttotalpagenumber}{\textbf{??}}
 
 
-\def\logo@front{logo_weiss}
-\def\logo@default{logo_blau}
-\ifx\pdfoutput\undefined
+\def\logo@front{TU_Logo_SW}
+\def\logo@default{TU_Logo_SW}
+\ifluatex
+  \def\logo@front{TU_Logo_SW}%
+  \def\logo@default{TU_Logo_SW}%
 \else
   \ifx\pdfoutput\relax
   \else

Vorlesungen/build.sh

@@ -5,23 +5,23 @@
 # Usage sh build.sh <lectureNumberAsString>
 
 fileprefix="TheoLog2017-Vorlesung-" # the start of generated PDFs
-tmpfilename="tmplecturefile" # don't have any files called like this!
+tmpfilename="`mktemp tmplecturefile-XXX`" # generate a name that doesn't collide with anything present
 
 printfilename=$fileprefix$1-print.pdf
 overlayfilename=$fileprefix$1-overlay.pdf
 
 printf "\\documentclass[aspectratio=1610,onlymath,handout]{beamer}\n\n" > $tmpfilename.tex
 tail -n +3 lecture-$1.tex >> $tmpfilename.tex
-pdflatex $tmpfilename.tex
-pdflatex $tmpfilename.tex
+latexmk -lualatex ${tmpfilename}.tex
+latexmk -c ${tmpfilename}.tex
 pdfnup --nup 2x2 --outfile $printfilename $tmpfilename.pdf
 
 printf "\\documentclass[aspectratio=1610,onlymath]{beamer}\n\n" > $tmpfilename.tex
 tail -n +3 lecture-$1.tex >> $tmpfilename.tex
-pdflatex $tmpfilename.tex
-pdflatex $tmpfilename.tex
+latexmk -lualatex ${tmpfilename}.tex
+latexmk -c ${tmpfilename}.tex
 mv $tmpfilename.pdf $overlayfilename
 
-rm $tmpfilename.*
+rm $tmpfilename $tmpfilename}.*
 
 printf "\n\n*** Finished creating files '$overlayfilename' and '$printfilename' ***\n"