included additional constructors for the JetFlavourInfo class
added JetFlavourInfo to pat::Jet
added new jet flavour to the PATJetProducer
added new jet flavour to the default configuration
added new jet flavour to Python tools
improved handling of jet 'labelName' in jetTools.py
now explicitly defining 'jetSource' in patTuple_metUncertainties_cfg.py
Merge pull request #3557 from cms-btv-pog/NewJetFlavour-PATIntegration_from-CMSSW_6_2_0_SLHC12

Integration of new jet flavour into PAT: Backport from 7_1_X to 6_2_X_SLHC