[PythonCAD] First pass at rewritten split code now available at repo

[Art Haas]

Hi.

As the subject indicated, people using Subversion can access the new
code by doing 'svn update'. There are still a few kinks to fix, in
particular with Circle/Arc splitting, but for those wanting to try it
out the code is available. Over the next couple of days there will be
more changes to the code but I'm pleased at how the new code is
simpler to follow and fixed a bug or two in the old code.

Art
-- 
Man once surrendering his reason, has no remaining guard against absurdities
the most monstrous, and like a ship without rudder, is the sport of every wind.

-Thomas Jefferson to James Smith, 1822