add stats and norm to the ranking
fix plotting of np ranking
fix trailing character
Merge pull request #10 from qbuat/master

add stats and norm to the ranking
fix prefit impact
reduce verbose
Merge pull request #11 from qbuat/master

Fix mu impact
update unit test in mva/tests/test_clf_events.py and updates to plot-postfit
minor updates
plot-ranking visual updates and new qcd sample attributes