Merge pull request #42 from senkin/working_branch

Many changes for ARC review kick-start
fix: Figure 2: the x-axis labels are a bit chaotic, you should use the same symbols as in the caption.
fix: Figures 4-8: - MADGRAPH->MadGraph for consistency with the text.
fix: Figures 4-8: data -> unfolded data.
fix: Figures 4-8: - I would remove the "times" symbol from the y axis.
fix: Figures 4-8: - combined -> e,mu +jets combined
fix: Figures 7-8: x-axis labels should use the same symbols as in the captions.
fix of fix MADGRAPH -> MadGraph (removing dirty hack)
added versions of the variables with and without ratio
fix: adding option to display MC stat errors
adding ratio plot for muon eta control region
fixing upper MC errors
increased dpi from 200 to 400
increasing upper limit for QCD control region plot so the legend fits
changed bins for HT and ST to reflect the minimal reconstructed HT and ST.
added ptttbar and MC@NLO systematic
adding MadGraph in both plots (generators and ttbar systematics)
adding new systematics
adding electron control region to configs
adding muion control region and using both electron and muon control region definitions for fitting