New morphing

This pull request includes:
-Rene's latest changes for using interpolation with VH and fixes for the HCG requests.
-Adding an option (off by default) to pick up fine_binning templates for the et, mt, em and tt channels to perform the morphing on these and then re-bin to the usual binning.

The code for the latter currently assumes the fine_binning templates are in the same file as the usual shapes. It is safe to allow the *fbsig.root files to supersede the *.root files for et,mt and em (I have tested this), although we are still waiting for the shape files for tt.