Weightloss

@ekfriis: I don't manage to manage to make the MVA MET to work, can you please have a look?

I use this file for testing:
/hdfs/store/user/tapas/2012-10-02-8TeV-53X-PatTuple_ShareFSFix/data_SingleMu_Run2012C_24Aug2012_v1/patTuple_cfg-003B900F-E9EE-E111-834F-00259073E3A0.root

Thanks