added option to draw data with poisson error bars, added function to set x axis range of histogram, added option to rename y axis, added option to input 4 coordinates for sig and bkgdMC legends
added --is option to include sig MC
Merge branch 'master' of https://github.com/jbrinson/OSUT3Analysis into jbrinson-master
Added code to handle the case of variably binned histograms correctly and moved
code out of the loop over bins.
added option to draw data with poisson error bars, added function to set x axis range of histogram, added option to rename y axis, added option to input 4 coordinates for sig and bkgdMC legends.