Merge pull request #565 from smuzaffar/IB/CMSSW_7_1_X/devel

sync with 71x/stable
use system python for mic
Merge remote branch 'origin/IB/CMSSW_7_0_X/stable' into IB/CMSSW_7_0_X/stable
Merge remote branch 'origin/IB/CMSSW_7_1_X/stable' into IB/CMSSW_7_0_X/stable
updated for CMSSW_7_1_0_pre6
MIC: sync geant4 version to stable branch