Merge pull request #16 from xerxes1986/master

Add final event categorization, add top pt reweighting fixes
switched to CSVM; added veto on 2-toptag events
Merge pull request #17 from missirol/master

switched to CSVM; added veto on 2-toptag events
fix in btag wp: switched to CSVM
Merge pull request #18 from missirol/master

fix in btag wp: switched to CSVM