SimplePrograms challenge

[Pete Forman]

Steve Howell <showell30 at yahoo.com> writes:

 > Feel free to change the page as you see fit, although thanks for
 > discussing it here first.

Done.  I've moved classes up as unittest depends on it.

The changes that I made to classes were:

1) Use new style class.
2) Demonstrate Pythonic use of attribute (no get/set).
3) Pare some lines.
-- 
Pete Forman                -./\.-  Disclaimer: This post is originated
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