Tag to be used with the master branch of atlas/athena.
Update(s) since 2.0.103:
  - Added FindHto4l.cmake and FindProphecy4f.cmake for finding those two MC generators in an LCG release;
  - Changed the environment to make applications look for LHAPDF files on /cvmfs/sft.cern.ch/lcg/external/lhapdfsets/current first.