Fitting

The scripts in experimental were used for debugging the fit.

Changes in the actual fitting used in the analysis:

- LL divided by number of templates
- gMinuit.SetErrorDef( 0.5 ) for LL errors (was 1)
- Remove constraints on QCD and V+Jets
- Set initial QCD template normalisation to 0.1 if less than 0.1


You are right (copy-pasta). This one does 
 - absolute_eta,M3,angle_bl 
 - absolute_eta 
 - M3 
 - angle_bl
which is less than before.