add packeges versions to the README
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.

Add possibility to build python bindings. If choosen check if all needed python dependencies are installed.

Rebase done.

First version which creates g4py on Mac OSX 10.9.

Fix build and installation directory.

Correct checkfile and names.

Export environment variable SIMPATH_INSTALL which is needed later on in some CMake scripts. The export was done up to now only for the automtic setting, but not for the menu.

Add additional flag which was requested by Thomas to also build the G4GDMLParser for FairShip. The flag is set when building the python bindings which is in the moment only done by FairShip.