Fixing typos
Updating configuration
Commenting out PDFs and fit results producers for ttbar generator systematics
Adding proper hadronisation uncertainty (powheg-herwig - powheg-pythia) and pt reweighting
Added PDF systematics, removed ptreweight systematic
Added PDFs in total systematics
Cleaning up tables
Fixing the issue #110
Removed unnecessary comments
Merge pull request #107 from senkin/measurement_fixes

Measurement fixes