Loop over all variables in postfit plots #71
Description
The scripts that makes the binned template and prefit stacks directly from the input files, being developed in #70 makes the plots for all the variables in the RDataLoader at once.
We should add this to the post-fit plotting script in https://github.com/HephyAnalysisSW/GOLLUM/blob/sbi-pdf/plot/pdf/plot.py