JB's stuff
merge with JB Sauvan's new-eg-l1-clustering
fix vertex and EtMiss producers: dont limit to geuine stubs
added two variant isolation variables in L1TrackEmParticle; added bx() method
first update of L1TrackEmParticleProducer.cc
updated HitMatchingAlgorithmRegister_cfi.py to set zMatching to False
first non-dummy version of L1TrackEmParticleProducer.cc
renaming L1Track -> L1Tk; added teh two L1TkElectron producers; non-dummy L1TkEmProducer
added __init__.py of other packages
updates for TTI_61X_TrackTriggerObjects_V3 (new names, examples for both L1TkElectron producers, L1TkEmProducer)