JetMETCorrections/Type1MET: CorrectedPFMETProducer: carry over significance to corrected MET (https://hypernews.cern.ch/HyperNews/CMS/get/csa14/11.html)
PackedGenParticle: add a method to get the edm reference to the mother
PATPackedGenParticleProducer: cut on abs(eta), not eta
keep protons and first daughters aka incoming partons
MINIAOD event content: remove explicit process name from keep statements (in particular, the process names for l1 information were wrong, so the objects were not kept)
pat::MET: add to the sent of uncertaintes also the central value. A better implementation of the whole pat::MET corrections (independent from the uncertainties, and more similar to the one of pat::Jet) would be better, but would be a much more intrusive change, while this one is minimal and preserves compatibility
Merge pull request #4914 from gpetruc/miniAODfix-fromCMSSW_7_0_7_patch1

MiniAOD 7.0.X fixes from CSA14 feedback