WCSim Validation

1cdb332c9eeee6159654e9d3c5056431cb2870df

Pull Request #569: Fix radon activity normalization

SK_500MeVem_centre_xdir

Tests
3293.45 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass