switch download url to github; closes #1

installation.tex

@@ -11,7 +11,7 @@ \section{Prerequisites}
 \begin{itemize}
   \item{Java Development Kit, 1.8 or later}
   \item{Supported Operating Systems: Windows, Linux, Mac OS X}
-  \item{Memory requirements: $>=$ 512MB RAM}
+  \item{Memory requirements: $>=$ 2GB RAM}
   \item{(preferably broadband) Internet connection}
 \end{itemize}
 
@@ -52,7 +52,7 @@ \subsection{Obtaining MGX}
 We regularly publish new releases of the MGX client application, which are
 available for download at\\
 
-    \url{ftp://ftp.cebitec.uni-bielefeld.de/pub/software/mgx/}.\\
+    \url{https://github.com/MGX-metagenomics/MGX-gui/releases}.\\
 
 An installation isn't necessary, just unzip the file and start the software
 from the \texttt{bin/} subdirectory (Linux: \texttt{mgx\_gui}; Windows: \texttt{mgx\_gui64.exe}). Please check whether an updated version