commented out mPiPi stuff
removed unused parameters/variables
changed cuts for pu conditions
deleted unused code / added consumes fix / changed identifiers to match cmssw conventions
loop over tracks (instead of expensive TrackRefs)
modifications for speed
paid attention to std::abs...
added cut on mPiPi, other minor tunes
Merge pull request #5951 from fojensen/v0branch

V0branch - modifications to V0Fitter (V0Producer) for PU