drop efficiency per step plot in subfolder. only save filled efficiency plots by default
changed usage of G4Allocator
Made GEMGeometry const thread-safe

const functions now only return containers which hold const pointers
to internal data. This now matches all other geometry containers.
fixed warning on geometry at the end of run
Merge pull request #3761 from civanch/g4allocator

Sim -- Code cleanup for Geant4.10
Merge pull request #3752 from thomreis/emdqmpostproc_works

DQM -- Egamma HLT RelVal improvements for harvesting module
Merge pull request #3760 from Dr15Jones/makeGEMGeometryConstThreadSafe

Multithreading -- Made GEMGeometry const thread-safe
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X