main() function.

- various minor cleanups for improved consistency

test case. As Jeremy put it: "subclassing is an implementation
technique, not a type declaration".

- slightly simplify a couple of examples
- clean up some markup

The example code did not work and could not easily be made to work.
Since the docs were already complex and the feature was not used
(it took two years for the errors to surface), we decided to dedocument
it entirely, leaving unittest cleaner than before.

* Reference the doctest.DocTestSuite() conversion tool.

Expanded docs to have a quick start example showing how
to create and run tests.

equality.  Note, there is another flavor that compares to a given
number of significant digits rather than decimal places.  If there
is a demand, that could be added at a later date.

attributes of the TestResult.

TestResult object.  Add an example of how to get even more information for
apps that can use it.
Closes SF bug #558278.

This closes SF bug #458771.

Added documentation for TestCase.assertRaises().

Added text for "Mapping concepts to classes", and merged it into the
front matter instead of separating it into a new section.

Removed use of "assert" in examples.

Update the descriptions to reflect further changes from discussions on
the pyunit-interest list.

Added documentation for the defaultTestLoader object and the
TestLoader methods.

Added the assert*() names for the TestCase helper methods.

Updated reference material substantially based on discussions on the
pyunit-interest mailing list (not all changes are in the code in CVS
yet).

Added description of optional parameter to the TestSuite constructor.

Added descriptions of the TestLoader and TextTestRunner classes.

Added method descriptions for the TestCase class.

Steve Purcell's documentation, and a lot of it is written based on
using PyUnit and reading the implementation.

There is more to come, but I want to get this check in before I have a
disk crash or anything else bad happens.