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
now also possible to do nice comparison plots for xs*br in mssm
bugfix
adjusted boundaries
Merge pull request #152 from ffrensch/master

compareLimits and bbh-ggh boundaries
fix a few bugs in the last commit and remove comments
category label missing for tt in btag and nobtag
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
Merge remote-tracking branch 'upstream/master'