Merge pull request #85 from roger-wolf/master

short description of how to use goodness-of-fit (SM 5a)
make executable
attempt a fix towards reliable running of the addFitNuisance code
Merge pull request #86 from ajgilbert/tail-fitting

attempt a fix towards reliable running of the addFitNuisance code
Merge branch 'master' of https://github.com/cms-analysis/HiggsAnalysis-HiggsToTauTau
elevated uncertainty file adaptor script to class
added tail-fitting for QCDshape uncertainty in mt 8TeV btag