H++ Stuff

I made some additions for Doubly-Charged Higgs. These changes shouldn't affect the production of common PAT-Tuples.

 - Added H++ to 3l and H++ to 4l MC samples w/ xsec to MetaData
 - Added xsec to ZJets samples
 - Added 4l lepton sorting specific to H++ in n-tuples (`dblhMode`)