Add new function to save pileup information for accumulators
different implentation of virtual functions for pileup information
pu scenario for CSA14, based on FastSimulation/PileUpProducer
add check on the axis labels when merging
using strcmp to compare strings
Merge pull request #2947 from deguio/checkAxisLabels

DQMServices/FwkIO -- add check on the axis labels when merging histograms
Merge pull request #2953 from mdhildreth/Mixing_save_PileupInfo_for_Digitizers

Sim -- Mixing save pileup info for digitizers
Merge pull request #2932 from lveldere/fastsim-CSA14-pu-profile

FastSimulation/PileUpProducer -- pu scenario for CSA14, based on FastSimulation/PileUpProducer
Update HLT tools scripts for new RunRegistry
Merge pull request #2955 from Martin-Grunewald/RRapiToolsUpdate

HLTrigger/Tools -- Update HLT tools scripts for new RunRegistry
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X