first batch of SM updates for e-tau and mu-tau

 - Update ZL stat. uncertainty nuisances in low stats 8TeV categories
   7TeV update pending
 - 8TeV W nuisances now combine latest stat uncertainty, ersatz
   recommendations, and new uncertainty for extrapolation factors
   from relaxed category selections
 - Updated 7 & 8TeV diboson stat uncertainties
Script to modify a datacard shape file in the same way another shape file was modified.
Useful to propagate pulls on shapes with different binning.
various bugfixes
bugfix
fix a few bugs in the last commit and remove comments
Merge pull request #154 from ffrensch/master

category label missing for tt in btag and nobtag
Merge pull request #153 from ajgilbert/cfg-updates

config file updates
Merge pull request #151 from mverzett/master

VH postfit plot bugfixes + features
scientifc notation for some tex tables
cosmetics for mssm-xsec