Dinko's suggestions for pruned genparticles
IVF and btag fixes
Merge pull request #11 from gpetruc/micro-from700

nonZS cluster shapes as userFloats: 70X version
Make setTriggerNames non-const: force people who want to use the by-name interface to make a local copy of the PackedTriggerPrescales, so it's threadsafe
AtomicPtrCache for the relinked electron supercluster
fix p4
thread-safe relinking of pat photon cluster, as it was done for electrons