some cosmetic improvements such as axis labels and dividing by bin width for the plots (not affecting datacards)
adding pdf output for plots as well as png
Merge remote-tracking branch 'upstream/master'
changing the start point for the tail fit for ttbar nobtag in emu to 200 GeV. This is important because choosing too low a starting mass (150 GeV) was causing a spikey discontinuity at the merge point with the lower part of the histogram.
one more pdf plot which I had missed
Merge remote-tracking branch 'upstream/master'
adding a correction from Andrew to the truncating of histograms to remove infinite points in shift up/down histograms
Merge pull request #105 from rcl11/master

Some tail fit improvements