Nst testsuite

NST is a test framework available through QuickLisp.  It isn't used on too many projects in QuickLisp yet, but it is used in a couple.

Modeling after the EOS framework, I think I added enough to integrate NST-based tests.

Unfortunately, NST doesn't export much of the functionality required to get the results easily and quickly so there is a good deal of referencing unexported symbols.  Once the NST developer is back from paternity leave, I'll probably try to get a more sanctioned way to retrieve the test results.

Thanks,
Patrick