Re-organising file structure to combine different k values
Fixing the zorder in main xsection plots. Data is on top, then MadGraph, etc.
Minor improvements for unfolding tests
Adding an option to combine before unfolding. Errors are added in quadrature
Updating k-values for combination with more sensible ones, adding exponential fit to k-value determination script
Merge pull request #72 from senkin/combining_kvalues

Combining k-values