Merge pull request #4 from kreczko/master

Syncing the fork
Merge pull request #5 from kreczko/master

Adding external tools and setup scripts
Merge pull request #6 from kreczko/master

Fixes for unfolding pull
Merge pull request #7 from kreczko/master

Fixes and functionality updates
fixing the names of the log files (from make_pull*.sh) to include the number of toy MC for error calculation.
ported the essentials for QCD estimation tool from AnalysisSoftware (electron channel)
added generator for QCD from data templates (correctly normalised)
adding *.root to gitignore. It's safer this way.
A futile attempt to make the cross section measurement procedure beatiful. To be continued.