[Gardeners] Testing framework for SUL

[Chris Dean]

One goal we have (well, at least I have) for the Standardized Utility
Library is to have unit tests for its functions and macros. 

I'd like to write them using just one unit testing framework, does
anyone have a preference of what framework we use?  This is a well
discussed area, but if you have a preference and are planning on
contributing to this project please cast your vote for your favorite
testing framework.

I was thinking we would use one of:

- RT: The classic solution.
- FiveAM: Part of the Arnesi suite.
- Peter's test framework: A minimalist choice that could grow as we
  needed features. From his Practical Common Lisp book
  http://www.gigamonkeys.com/book/practical-building-a-unit-test-framework.html

Other options are listed here:

  http://www.cl-user.net/asp/tags/unit-testing

I normally use FiveAM.

Cheers,
Chris Dean