license note

[jimmyland]

fwiw there is a version of the predicates code that Shewchuk did release under BSD; it's buried in Starbase.c inside Stellar, here: https://people.eecs.berkeley.edu/~jrs/stellar/

Also, I think anything you added on top of the original predicates code (your tests, demos, new organization, etc) is default copyrighted by you, so if you want people to be able to use it, you may want to put a license on it.