\documentclass{beamer}

\makeatletter
\let\beamer@writeslidentry@miniframeson=\beamer@writeslidentry
\def\beamer@writeslidentry@miniframesoff{%
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\newcommand*{\miniframeson}{\let\beamer@writeslidentry=\beamer@writeslidentry@miniframeson}
\newcommand*{\miniframesoff}{\let\beamer@writeslidentry=\beamer@writeslidentry@miniframesoff}

\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{ngerman}
\usepackage{graphics}
\usepackage{pgf}
\usepackage{multimedia}
\usepackage{color}
%\usepackage{listings}
\usepackage{hyperref}

% beamer: How to place images behind text (z-order)
% (http://tex.stackexchange.com/a/134311)
\makeatletter
\newbox\@backgroundblock
\newenvironment{backgroundblock}[2]{%
  \global\setbox\@backgroundblock=\vbox\bgroup%
    \unvbox\@backgroundblock%
    \vbox to0pt\bgroup\vskip#2\hbox to0pt\bgroup\hskip#1\relax%
}{\egroup\egroup\egroup}
\addtobeamertemplate{background}{\box\@backgroundblock}{}
\makeatother

\usetheme{Dresden}

\addtobeamertemplate{navigation symbols}{}{%
    \usebeamerfont{footline}%
    \usebeamercolor[fg]{footline}%
    \hspace{1em}%
    \insertframenumber/\inserttotalframenumber
}

\title{System - PHP Framework}
\author{von Ulf Gebhardt}
\date{\today}
	
\begin{document}

\frame{\titlepage}

\input{tex/1.section.toc}
\input{tex/2.section.introduction}
\input{tex/3.section.system}
\input{tex/4.section.git}
\input{tex/5.section.software}

\appendix

\input{tex/6.section.outro}
\input{tex/7.section.system.gems}

\end{document}