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Don't clobber polygon edge-lists.
List classess, whitespace
Change test to use polygon class and fix some things.
Wrap polygon representations in a class, some cosmetic changes.
Untabify and whitespace-cleanup
Add key to make-tree
Update to TREES 0.10 interface.
Fix typo in comment.
Update system definition a bit.
Add package nickname same as system name.
Change name of the system, also remove bogus package.
Add file to which polygon binary operations were moved.
Add file to which polygon operations were moved.
Add emacs temporary files and fasls to .gitignore
Add docstrings and export symbols for set operations on polygons.
Remove function which were moved to a different file and not saved.
Add set operations on polygons.
Tweak some things.
Move some more.
Move functions into new files, some minor changes.
Change passing sweepline to event to add-if-intersection.
Export symbols, add decomposition into triangles and test.
Remove debug (print ...)
Unwrap points from ring nodes before passing them into recursive call.
Generalize edge from points generator.
Add decomposition procedure using Bentley-Ottmann.
Add checking for degenarate line segments to frustrated-polygon-p, ad…
…d some docstring.
Doesn't crash, anyway, passes basic tests.
Tweak special cases.
Rewrite line segment ordering.
Trying to locate bugs.