TTI 62 x Version of the code used for the TP version circulated in August

- contains the L1Tracking code (tracklet approach).
- contains the Track-Trigger object algorithms (the various L1TkXXXProducers in SLHCUpgradeSimulations/L1TrackTrigger/plugins)
- L1Jet algorithm: new code from Nick Wardle, Jad Marrouche et al, which delivers L1Jets that are reasonable even at PU=140  (SLHCUpgradeSimulations/L1CaloTrigger). I think there were changes in SimDataFormats/SLHC as well, for the L1CaloTower.h et al files
- also contains the (new) code that builds simple L1EG objects based on crystal-level information, from Nick Smith and Sasha Savin (in SLHCUpgradeSimulations/L1CaloTrigger/plugins, L1ExtraCrystalPosition.cc and L1EGammaCrystalsProducer.cc. New class L1EGCrystalCluster.h in SimDataFormats/SLHC)