WCSim Validation

a08d79a27f5f3fbc6da77a831e80db1bdfb4aa7f

Pull Request #520: Update LI code, better sampling

HKFDOD_5MeVem_centre_xdir

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