[handbook] Update information to reflect open-source'd UG.

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@12700 2fb0f335-1f38-0410-981e-8018bf24f1b0

doc/handbook/dumux-handbook.bib

@@ -995,7 +995,7 @@
 }
 
 @MISC{UG-HP,
-  title = {The {UG} Homepage: \url{http://atlas.gcsc.uni-frankfurt.de/~ug/}},
+  title = {The {UG} Homepage: \url{http://www.iwr.uni-heidelberg.de/frame/iwrwikiequipment/software/ug}},
   key = {UG}
 }
 

doc/handbook/install.tex

@@ -249,10 +249,9 @@ In the following list, you can find some external modules and external libraries
   library for the direct solution of large, sparse, non-symmetric systems of linear equations.
   Download: \texttt{\url{http://crd.lbl.gov/~xiaoye/SuperLU}}
 
-\item \textbf{UG}: External library for use as grid. UG is a toolbox for unstructured grids, it is not
-  available under a open source license. \Dune provides patches which have to be applied before
-  compiling UG. Building it makes use of the tools \texttt{lex}/\texttt{yacc} or the GNU variants of
-  \texttt{flex}/\texttt{bison}. 
+\item \textbf{UG}: External library for use as grid. UG is a toolbox for unstructured grids, released under GPL.
+  To build UG the tools \texttt{lex}/\texttt{yacc} or the GNU variants of \texttt{flex}/\texttt{bison} must be provided.
+  Download: \texttt{\url{http://www.iwr.uni-heidelberg.de/frame/iwrwikiequipment/software/ug}}
 \end{itemize}
 
 The following are dependencies of some of the used libraries. You will need them depending on which modules of \Dune and which external libraries you use.