\documentclass[a4paper,14pt,twoside
%,draft
]{scrreprt}

\usepackage[parfill]{parskip}
\usepackage{graphicx}
\usepackage{fancyhdr}
\usepackage{eso-pic}
\usepackage{caption}
\usepackage{hyperref}
\usepackage{wrapfig}

\usepackage{fontspec}
\usepackage{polyglossia}
\setmainlanguage{german}
\newcommand{\glqq}{„}
\newcommand{\grqq}{“}

\definecolor{ifsrgreen}{rgb}{0.69, 0.88, 0.11} % 177, 225, 28
\definecolor{ifsrgray}{rgb}{0.6, 0.6, 0.6} % 153, 153, 153

\setmainfont{PT Sans}
\setkomafont{chapter}{\color{ifsrgreen}\fontspec[BoldFont={* Bold}]{Exo}\huge}
\setkomafont{chapterentry}{\normalfont\bfseries}
\setkomafont{minisec}{\color{ifsrgray}\fontspec[BoldFont={* Bold}]{Exo}\large}
\setkomafont{paragraph}{\color{ifsrgray}\fontspec[BoldFont={* Bold}]{Exo}}
\setkomafont{pagenumber}{\color{ifsrgray}\fontspec{Roboto}}

\sloppy % forces "ugly" line breaks

\pagestyle{plain}

%Das Coverbild, oh gott o.O Aber es funktioniert
\newcommand\CoverPic{%
\put(0,0){%
\parbox[b][\paperheight]{\paperwidth}{%
\vfill
\centering
\includegraphics[width=\paperwidth,height=\paperheight,%
keepaspectratio]{img/cover_2014}%
\vfill
}}}

%Das Rückbild, den Text können wir aber nach wie vor hier direkt reinschreiben, erzeugen wir einfach ne leere farbige Rückseite.
\newcommand\BackcoverPic{%
\put(0,0){%
\parbox[b][\paperheight]{\paperwidth}{%
\vfill
\centering
\includegraphics[width=\paperwidth,height=\paperheight,%
keepaspectratio]{img/backcover_old.png}%
\vfill
}}}

\begin{document}

\include{cover/front}
\tableofcontents
\include{texte/vorwort}
\include{texte/grusswort}
\include{texte/studienbetrieb}
\include{texte/checkliste}
\include{texte/moduluebersicht}
\include{texte/f1help}
\include{texte/auditorium}
\include{texte/fsr}
\include{texte/cd}
\include{texte/ascii}
\include{texte/zih}
\include{texte/glossar}
\include{texte/links}
\include{texte/campusplan}
\include{texte/werbung}
\include{cover/back}

\end{document}