Updating 7TeV inputs

- svfit uses vegas integration
- fix for pileup jet ID WP bug
- fix vbf category naming bug for e-mu (vbf_loose, but not with
  vbf_tight veto)
- Added hres ggH pT reweighting and systematic uncertainty shape
- ZL mass shift nuisance in all categories
- Switch to shape-subtraction full-iso method for QCD in 1jet_medium
  e-tau
- Add low mass QCD shape nuisance for 1jet, vbf and btag categories