updates to triangluation. Still have a long way to go..
Getting closer.
Even closer.
 - broke up intersecting edges
 - merged identical points
Moved edge event to function
Reorganized triangulation into class, added some tests.
bugfixes and tests
All normalization tests pass.
Most pieces working again.
Still need edge_event and invalid tri removal
minor edits
finished part of edge_event, fixed a few bugs
Corrected front adjustment in edge_event
minor edits
more work on edge_event
minor fixes
more minor fixes
triangulation test works. Yar!
polygon visual is working with new triangulation code.
Fixes, filled in a bit more of edge_event mode=1
more fixes
yet more fixes