[handbook] Improve detailed installation instructions

doc/handbook/2_detailedinstall.tex

@@ -107,18 +107,17 @@ on the Dune grid interface, act similar.
 \paragraph{Obtaining \Dune and \Dumux from software repositories}
 Direct access to a software revision control system for downloading code can be of advantage later on.
 It is easier to keep up with code changes and to receive important bug fixes.\Dune and \Dumux use
-Git for their software repositories. To access them a certain programs are needed which
-is referred to here shortly as Git client.
+Git for their software repositories. To access them a Git client is needed.
 
-In the technical language of Git \emph{cloning a certain software version} means nothing more then fetching
+In the technical language of Git, \emph{cloning a certain software version} means nothing more then fetching
 a local copy from the software repository and laying it out in the file system.
-In addition to the software some more files for the use of the software revision
+In addition to the software, some more files for the use of the software revision
 control system itself are created. If you have developer access to \Dumux, it is
 also possible to do the opposite, i.\,e. to load up a modified revision of software
 into the software repository. This is usually termed as \emph{commit} and \emph{push}.
 
 The installation procedure is done as follows:
-Create a  {\Dune} root directory, named \texttt{dune} in the lines below.
+Create a  {\Dune} root directory, named e.g. \texttt{DUNE-ROOT} in the lines below.
 Then, enter the previously created directory and check out the desired modules.
 As you see below, the check-out uses two different servers for getting the sources,
 one for \Dune and one for \Dumux.
@@ -126,8 +125,8 @@ The \Dune modules of the stable 2.4 release branch are checked out as described
 on the \Dune website \cite{DUNE-DOWNLOAD-GIT}:
 
 \begin{lstlisting}[style=Bash]
-$ mkdir DUMUX
-$ cd DUMUX
+$ mkdir DUNE-ROOT
+$ cd DUNE-ROOT
 $ git clone -b releases/2.4 https://gitlab.dune-project.org/core/dune-common.git
 $ git clone -b releases/2.4 https://gitlab.dune-project.org/core/dune-geometry.git
 $ git clone -b releases/2.4 https://gitlab.dune-project.org/core/dune-grid.git
@@ -137,9 +136,9 @@ $ git clone -b releases/2.3 https://gitlab.dune-project.org/PDELab/dune-typetree
 $ git clone -b releases/2.0 https://gitlab.dune-project.org/PDELab/dune-pdelab.git
 \end{lstlisting}
 
-The newest and maybe unstable developments are also provided in these repositories and is called \emph{master}.
-Please check the \Dune website \cite{DUNE-DOWNLOAD-GIT} for further information. However, the current \Dumux release
-is based on the stable 2.4 release and it might not compile without further adaptations using the newest versions of \Dune.
+The newest and maybe unstable developments are also provided in these repositories and can be found in the \emph{master} branch.
+Please check the \Dune website \cite{DUNE-DOWNLOAD-GIT} for further information. We always try to keep up with the latest developments of \Dune.
+However, the current \Dumux release is based on the stable 2.4 release and it might not compile without further adaptations using the newest versions of \Dune.
 
 Furthermore, if you wish to install the optional \Dune Grid-Howto which provides a tutorial
 on the Dune grid interface, act similar.