Add n b-tag variable
Several updates
Control plots
Update reducible estimation
Merge remote-tracking branch 'yuta/CMG_PAT_V5_18_from-CMSSW_5_3_14' into EMuTau

Conflicts:
	CMGTools/H2TauTau/th_analysis/EMuTau/analysis/wjet_control.py
Merge branch 'steggema-EMuTau' into CMG_PAT_V5_18_from-CMSSW_5_3_14