Check if git is available.
Stop execution when there was an error when running CMake.
Get the geant4_vmc source code from git. There are problems with the the latest stable release when using Geant4 10.0.
Add possibility to build python bindings. If choosen check if all needed python dependencies are installed.

First version of the external packages with possibility to build the python bindings for geant4 and root.

Patch to fix downcasts which results in errors when using Clang with c++11.

First version of the external packages with possibility to build the python bindings for geant4 and root.

Patch to fix downcasts which results in errors when using Clang with c++11.
Fix