factor out normalization fitting into new method on Analysis
update norms
update norms
add script to compare norms with a plot
compare dEta fit with fit of other variables
Merge pull request #31 from qbuat/master

fix access to the binning in sample.py
add plot-norms script
update plot-norms
add print-out
fix cat_name
fix cat_name
fix cat_name
fix cat_name