Aesthetic changes to plotting
Two bug fixes: 1) right vertex fraction was being overwritten 2) summed datasets were being overwritten. Also projection pdf plots had wrong normalization.
Fix to error bands where previously crossing at 1 and 4 was calculated on NLL not 2*NLL
Merge pull request #189 from matthewkenzie/bkg_plot_debugging

Fix to error bands where previously crossing at 1 and 4 was calculated on NLL not 2*NLL
Merge pull request #188 from matthewkenzie/sig_fit_cutbased_debug

Sig fit cutbased debug