WCSim Validation

7cccc7bbcdc3defccbed097ebc147502152dad4f

Pull Request #510: Clarify how dark mode 1 works with multiple PMT types

IWCD_500MeVmum_centre_xdir

Tests
2875.74 sec
wcsimrootevent plot pass
wcsimrootevent2 plot pass
wcsimrootevent_OD plot pass
Geom pass
bad pass
Geometry warnings pass