\newcommand{\allauthors}{
\author{
\addauthor{Markus Hofst\"atter}{07xxxxx}{markus.manrow@gmx.at}\and
- \addauthor{Martin Perner}{07xxxxx}{martin@perner.cc}\and
+ \addauthor{Martin Perner}{0725782}{e0725782@student.tuwien.ac.at}\and
\addauthor{Stefan Rebernig}{07xxxxx}{stefan.rebernig@gmail.com}\and
\addauthor{Manfred Schwarz}{0725898}{e0725898@student.tuwien.ac.at}\and
\addauthor{Bernhard Urban}{0725771}{lewurm@gmail.com}