Update leptons

[jkarancs]

PR content:

• Remove eventShapeVars as Sal recommended
• Put back variables needed for lepton IDs, becasue ele ID has isolation, so some people want to remove that, and also new 2016 recommendations are not yet available as VID, but we have cut recipes already
• There used to be 3D impact points, some people use to cut on 3D significance, so this is now possible
• I updated miniIsolation to use the latest pileup correction recommendation: https://hypernews.cern.ch/HyperNews/CMS/get/b2g-selections/259.html
• Keep top parent in genPart collection