WCSim Validation

ba88020456994b81e2eb0a267eab92db979557c6

Pull Request #547: Fixes photon timing and theta binning.

WCTE_5MeVem_centre_xdir

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