WCSim Validation

fbae23f6ef761bbb2e6a1f327adfc6cdb1e929a1

Pull Request #558: separate tyvek reflectivities

HKFD_5MeVem_centre_xdir

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