Dump way to clone an initial remote git repository

For getting an initial checkout of the git repository my approach just adds a git binary, which was compiled with mingwgitdevenv and a short batch script.

The installer code executing this is in the folder where mingwgitdevenv is installed is still missing, as I'm not very familiar with IS.

Signed-off-by: Thomas Braun <thomas.braun@virtuell-zuhause.de>