WCSim Validation

e5a162169a0c4f3b9305d1f0071f8aa071816b98

Pull Request #561: Radioactivity update

SK_5MeVem_centre_xdir

Tests
124.45 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass