WCSim Validation

4fdb45186555cabd44a76c47f52b3813aa2cb25d

Pull Request #537: Update IWCD geometry

HKFD_500MeVem_centre_xdir

Tests
11986.28 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass