WIP: Pull request for merging LMU modifications

[SimonRit]

No description provided.

[acoussat]

I have converted pctpairprotonsLomaLinda.cxx to Python here: SimonRit#1. Feel free to comment on it. I still would like to add a test before merging.

I'm not sure what needs to be done with pctpairprotonsLMU_IMPCT.cxx, as far as I understand the conversion does not do much besides applying some fluence level (as in pctpairprotonsLomaLinda.cxx ), filtering protons and alpha particles in a way I don't fully understand (what are 2212 and 1000020040?), and converting centimeters to millimeters. Also, I don't have a test file for this case.

I don't fully remember what was said about those scripts, sorry.