changed mt2 to float , move block from Core to the multilepton, customiz...

...e susy had (no JetID , fill PU, add trigger bit , nMuons, nLeptons) , customized the HT/MHT and jets collection add the (rho, PUjetID, isData)
nMuons10 definita con pt cut a 20?
nLeptons10 conta selectedElectrons?