WCSim Validation

d7c7e765b5508df72a11b9ae81907e95a382fadb

Pull Request #560: Standardise sampling method for li sources

HKFD_5MeVem_centre_xdir

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