Updated instructions in README and change of default options
Now make datacard with simple python script. Need for datacard trees removed.
Merge pull request #1 from matthewkenzie/setupNewSyst

Setup new syst
More modifications for propagating single photon systematics.
Also new script for making parametric model datacard without need for seperate trees.
Merge pull request #133 from matthewkenzie/photon_cat_systematics

Photon cat systematics