Merge pull request #27 from jjacob/master

Fixes issue #24: Checking of sample names and uncommenting luminosity weighting.
Adding variables ST, HT and MT to Event class
Adding HT and ST to METAnalyser
Fixing BristolTopGroup/AnalysisSoftware/#22 & BristolTopGroup/AnalysisSoftware/#23: Adding TTbar_plus_X_analyser with reduced control region set and with additional variables (BinnedVariableAnalyser).
replacing TTbarPlusMETAnalyser with TTbar_plus_X_analyser
updating gitignore
Removing python/old_configs
Merge pull request #28 from kreczko/master

Binned analysers and control plots for HT, ST and MT (bonus!)
Corrected/modified filenames of two samples in python/master_2012_cfg.py.