added default argument for name in jetID, and returning 0,1,2,3 in the default case
added jet area, changed Id to id and puJetId to puId
changed default PFID argument to POG_PFID
Merge pull request #88 from pandolf/CMG_MiniAOD_Lite_V6_0_from-CMSSW_7_0_6

Jet ID related variables (7.0.X)