1.add particle flow isolation memeber function for PAT photon data and 2.change the token argument as reference for the function readIsolationLabels for muon,electron and photon producer and 3.make particle flow isolation turn on as default for muon,electron and photon.
Merged 7_0_0_pre12-photon from repository cms-analysis-tools
add pileup sequence for only muon, electron and photon
Merged 7_0_0_pre12-photon from repository cms-analysis-tools
Fix inclusion of pfParticleSelection.
Remove old wood, related to pfIso.
Merge pull request #2358 from cms-analysis-tools/70X-photon

PAT -- 70 x photon