First commit with essential files only
Remove gdml requirement for Geant4
Ignoring some maybe useful symlinks/directories
Improving build system, no environment needed if ROOT/Geant4 installed under /opt
./A2 finds the DATA files for simulation in a "clean" shell (no sourcing required!)
Adding the pluto2mkin tool from D.Wertmueller
Cleaning up header files
Modified the thickness of the frozen spin target A2PolarizedTarget.cc
because they were 10 times larger than in reality
Modified starting point of reading input file in GEANT4 to avoid the
translation of the event number while passing the event through GEANT4
Adding /cern/geant4 as default search path
Explicitly use bash to make geant4 source script always work