add deta and dphi to hit outputs
This merge request addresses bullet point 8 of issue 40! by adding dEta and dPhi to the jet axis to the outputs of the saved hits. I attach the dPhi and dEta distributions for the saved hits contained in a set of 1000 jets, and a TGraph showing the positions of all the saved hits inside a single jet. Everything seems fine, in particular nothing exceeds the existing 0.04 cut on the dR of the hits to the jet axis.
