WCSim Validation

eeda94f0e806ee1d2b0ec3ebce33b9ef6db1cacb

Pull Request #541: fix tyvek modeling

SK_5MeVem_centre_xdir

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