Fixed URL and double section.

[[Imported from SVN: r1316]]

doc/comm/communication.tex

@@ -60,7 +60,7 @@
 \title{Communication within the Iterative Solver Template Library (ISTL)\thanks{Part of the
     Distributed and Unified Numerics Environment (DUNE) which is
     available from the site
-    \texttt{http://www.dune.uni-hd.de/}}}
+    \texttt{http://www.dune-project.org/}}}
 
 \author{%
 Markus Blatt\\
@@ -89,8 +89,6 @@ email: \texttt{Markus.Blatt@iwr.uni-heidelberg.de}}
 \end{multicols}
 
 
-\section{Introduction}
-\label{sec:introduction}
 \section{Introduction}
 \label{sec:introduction}