Centrally produced scale factors for the electron ID MVA working points on the
EGamma TWiki.
Added two optional parameters to the ElectronSFWeight constructor which are the
filename of the ROOT file containing the scale factor histogram and the name of
the histogram. Also added a histogram member to the class.
Added code for accessing the electron scale factors in histograms.
Added definitions for two new parameters for electron scale factors.
Added two new parameters for optionally getting the electron scale factors from
a histogram.
Added new parameters for optional electron scale factors from histograms.
Test for the existence of the electron scale factor ROOT file before trying to
open it. This is how it determines whether to use the hard-coded scale factors
or get them from a histogram.
Include fstream header.
Fixed the comments for the new electron scale factor parameters.
Merge branch 'master' of https://github.com/OSU-CMS/OSUT3Analysis