Polygons now untangled if lines cross. Can test by running UserDev/ShowerRecoUtil/mac/example.py -s uboone/data/users/kterao/YaleStudy/ForwardSingleShower/LArLight/electron_merged/combined_*.root   If you find a bad polygon let me know! --David Caratelli
???--David CaratelliMerge branch 'trunk' of github.com:larlight/LArLight into trunk