Sample weights merged#2

Open

mverzett wants to merge 4 commits intomasterfrom

sample_weights_merged

Commits on May 24, 2018

Squash 4 commits to allow easier merging
mauro verzetti
committed
making datasets compatible again
mauro verzetti
committed

Commits on May 30, 2018

add uncertainties on the loss plots for MC-based trainings
mauro verzetti
committed
introduced stretching
mauro verzetti
committed