- fixed segmentation violation in tailfit macro

 (the fix is to not to qualify the fit options using the "RooFit::" namespace, i.e. use "using namespace RooFit;"+"Save" instead of "RooFit::Save"... still very weird)
- use tailfit also for QCD templates for jet -> tau fake-rate uncertainty
- apply Higgs Pt reweighting only to "ggH", not to "signal" (= bbH + ggH, i.e. don't apply Higgs Pt reweighting to b-associated production)