update install procedure

01_download.tex

@@ -23,8 +23,8 @@ not depend on Fortran.
 
   \item 
 If you want \exahype\ to exploit your multi- or manycore computer, you have to
-have Intel's TBB or OpenMP. Both are open source and work with GCC and
-Intel compilers. OpenMP 4 (coming along with GCC 4.9) or TBB 2017 are required.
+have Intel's TBB. it is open source and works with GCC and
+Intel compilers. At least TBB 2017 is required.
 
   \item  
 If you want to run \exahype\ on a distributed memory cluster, you have to have
@@ -37,8 +37,6 @@ ExaHyPE's default build environment uses GNU Make.
   \item 
 ExaHyPE's development environment relies on Python 3. All additional Python 3
 dependencies can be downloaded using the git submodules and the provided script.
-
- 
 \end{itemize}
 
 \noindent
@@ -54,10 +52,9 @@ libraries are required.
 
 \exahype\ is available as source code only. We discuss several variants how to
 obtain the code below.
-\exahype\ is built on top of the AMR framework \peano\.
-If you download a complete snapshot of \exahype\ (the \texttt{tar.gz} files), a
-snapshot of \peano\ is included.
-If you clone the repository (Variant 2), you have to add \peano\ manually.
+\exahype\ is built on top of the AMR framework \peano\ .
+
+
 
 
 \subsection*{Variant 1: Download an \exahype\ release}
@@ -79,6 +76,19 @@ or
 > git@gitlab.lrz.de:exahype/ExaHyPE-Engine.git
 \end{code}
 
+You can then install all dependencies using 
+\begin{code}
+ > ./Submodules/updateSubmodules.sh
+\end{code}
+
+
+\subsection*{Variant 2: Download an \exahype\ snapshot (not recommended)}
+Go to \url{http://www.peano-framework.org/index.php/exahype/} and download a tar.gz file of a recent release. A
+snapshot of \peano\ is included.
+
+If this option is chosen all dependencies must be installed manually.
+
+
 \section*{Obtaining the dependencies}
 ExaHyPE's development environment relies on a few Python 3 dependencies. They are
 all registered as git submodule to the project. \peano\ is also registered as a