new packages - either ported from CVS or approved previously by sim grou...

new packages - either ported from CVS or approved previously by sim group previously:

SimTracker/SiPhase2Digitizer : merged pixel+strip+pixelstrip digitizer code

Separation of SimDataFormats/SLHC into proper data format and supporting Sim information. Move of algorithms out of SLHCUpgradeSimulations subsystem into proper area
DataFormats/L1TrackTrigger (cluster, stub and track classes)
L1Trigger/TrackTrigger (producers and algorithms)
SimTracker/TrackTriggerAssociation (MC truth maps + their producers)