Updates to the ttHAnalysis framework from the RA1 SUSY group (alphaT)

Added control region variables for the AlphaT analysis to ttHAlphaTControlAnalyzer

Added an optional met with no muons to ttHMetAnalyzer

Added biased delta Phi to the ttHCoreEventAnalyzer

Added general purpose object skimmer: ttHObjectSkimmer. This takes the type of object to skim as a parameter, along with the name of the folder to be made by the skimmer in the output.

Added ttHIsoTrackSkimmer that skims on isolated tracks. There are also options to check if the isolated tracks are those from a muon or electron, and ignore these when skimming.

Added to the ttHGenEventAnalyzer the variables used for binning when generating events. E.g. the PtHat value or QScale. This is used for validation of the MC reweighting.

Added the option to put bools in the tree defined in Tree.py