[PythonCAD] New stuff for seventh release

[Art Haas]

Hi.

I've just added some code in that makes it easy to draw a construction
line parallel to another construction line at a given distance away. The
code has been added into the subversion repository, and sent to the
mirror, so you should be able to get it and see how it works. I've
started looking at adding the ability to draw tangent construction
circles against construction lines. Doing this against a single
construction line will be done first, as that is relatively easy to do.
Drawing construction circles against two construction lines, or a
construction line and circle, or two construction circles will be looked
at next. These are a little more involved it seems...

Art

-- 
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 -- Theodore Roosevelt, Kansas City Star, 1918