Adapt recHits validation _cfg.py and .C files to new root directory structure
Adapt to new root directory structure, take 2
Remove duplicate code in associateHit, associateSimpleRecHit
Remove all references to crossing-frame pointers
break from simTrack search when match to simHit is found; remove unused stripHits bool
Streamline input; enable non-cf PSimHit collections
hitAssociator remove commented-out lines
TrackerHitAssociator mods only
Merge pull request #3021 from wmtford/newAssoc

SIM -- Substantial clean-up of TrackerHitAssociator