WCSim Validation

a08d79a27f5f3fbc6da77a831e80db1bdfb4aa7f

Pull Request #520: Update LI code, better sampling

HKFDOD_500MeVem_ODbarrelUp_startX

Tests
2612.51 sec
Failed wcsimrootevent plot comparisons
Failed wcsimrootevent2 plot comparisons
Failed wcsimrootevent_OD plot comparisons
Geom
bad
Geometry warnings pass