drop obsolete passZwindow
drop obsolete passMll passZVeto
passMETRel -> passMetRelMin; drop default minval
cleanup comments
major cleanup, delete unused methods and datamembers from SusySelection

Details:
from SusySelection, remove several obsolete datamembers:
- m_fileName
- m_do1fb
- m_doAD
- m_dumpCounts
- m_nLepMin
- m_nLepMax
- m_cutNBaseLep

and several member functions, along with their calls elsewhere:
- passNLepCut()
- passNBaseLepCut()
- dumpInterestingEvents()
- dumpTrigFlag()
- debugEvent()
- dumpPreObjects()
- dumpJets()
- checkSys()
- setFileName()
- getFileName()
- setUse1fb()
- is1fb()
- setUseAD()
- isB3()
- printLep()
- printJet()
computeChargeFlipProb: qflip affects both magnitude and direction of met