README SimTracker/TrackTriggerAssociation

S.Viret: 26/07/16

Documentation on TrackTriggerAssociation package is available on the following Twiki page:

For the TTClusters: https://twiki.cern.ch/twiki/bin/viewauth/CMS/SLHCTrackerTriggerSWTools#MC_truth_for_TTCluster

For the TTStubs: https://twiki.cern.ch/twiki/bin/viewauth/CMS/SLHCTrackerTriggerSWTools#MC_truth_for_TTStub