Fix openloops
Merge pull request #1246 from ktf/fix-openloops

Use -O0 to compile openloops
Drop openloops
Merge pull request #1247 from ktf/drop-openloops-73X

Drop openloops
Merge remote branch 'origin/IB/CMSSW_7_3_X/stable' into IB/CMSSW_7_0_X/stable
Merge remote branch 'origin/IB/CMSSW_7_3_X/gcc491' into IB/CMSSW_7_0_X/stable