Merge pull request #14 from gpetruc/miniAOD-from710pre5

thread-safe relinking of pat photon cluster, as it was done for electrons
Merged miniAOD-from710pre5 from repository arizzi
remove unwanted test file
cleanup getbylabel
Adding a few missing setters to GenJet and GsfElectron (used for slimming in miniAOD)
make patobjects friends of the slimmers, remove the defines, use newly added setters for reco base class data