rewrote tests in unittest/ to python unittests

Dear List Reader,

on popular request (by a single guy) I rewrote the tests in
the a-a-p directory Exec/unittest to be regular python
unittests. One advantage is, that the tests wont stop (sys.exit())
if a single tests fail.

Another advantage might be, that other coders could write
unittests, since they know how the usual python unittests
work.

I included the unittest.py (since Bram works with older
python releases that have it not includes - todays 
python releases have). It originally lives on:
pyunit.sourceforge.net

I attach a tarball, that should be unpacked in the Exec directory.
To run the tests just call:
joerg@home> python unittest/checks.py 
.........
----------------------------------------------------------------------
Ran 9 tests in 0.065s

OK

Later I will append unittest, that actually run receipes to test, if they
work. This tarball tests on a lower layer: python functions and classes,
but the technique is the same.

If you have questions, feel free to post on the a-a-p list, I am subscribed.

    maybe you could use it.
    Joerg



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