WCSim Validation

e8c9f3debbb3042ac7a30bdeee74496e4d052390

Pull Request #557: Feature/individual pmt dark rate

IWCDOD_500MeVem_centre_xdir

Tests
3725.48 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass