for VHmet take photons in barrel and endcap
Merge remote-tracking branch 'h2gglobe/master'
Modifs to signal model escale and smearing systematics:
- changed treatment of global energy scale
- remove nuisances from formulas if they don't produce an effect
adding c and l matching in reduction
add dijet preselction
new dijet weights
new combined weights
for vbf validation
for vbf validation
changes for new weights
rewriting btagSF computation according to new variables/categories
Scale R9 for cic only
update to sf files
Imported GBR MVAs (switched off by default)

also addressed #233
tth at 7 TeV implemented
Fixed typo in GBR weights file name
fix sign in r9 correction
fix for r9 scaling in data
activate r9 scaling for mc 8 TeV
Fixed typo in energy scale formula in parametric model