adding all configuration files used so far for submission of ntuple v9a CRAB jobs.
Adding Summer12 unfolding configs
generalising the unfolding work-flow to easily include new variables.
Cleaning up variable names in UnfoldingAnalyser:
Change someVariable to some_variable
Updating the reco jet collection for the unfolding analyser.
Currently selectedPatJetsPFlow changing to "topPairEPlusJetsSelection", electronselectionPrefix + 'cleanedJets', 'PAT' (+ muon version)

Also fixing unfolding work flow by removing old analysers and other things.
Correcting typo in WJetsToLNu_TuneZ2Star_8TeV-madgraph-tarball_Summer12_DR53X-PU_S10_START53_V7A-v1_AODSIM_nTuple_v9a_LeptonPlus3Jets.cfg CRAB configuration file.
Updated 2012 selections.
BristolTopGroup/NTupleProduction/#24
Corrected errors in previous pull request #24.
Fixing issue BristolTopGroup/NTupleProduction/#26: putting signal lepton into event.
Modifying CRAB configuration file for TTJets dataset to include storePDFweights.
Fix for BristolTopGroup/AnalysisSoftware/#30 and BristolTopGroup/NTupleProduction/#25
Adding additional METs in the unfolding