Decided to add a basic testing framework - mostly because I'm mucking about
with parsing and another library, want something to let me know when I've
REALLY screwed up.

Please note that the current stable version of FiveAM will not run these tests,
as it doesn't have the *features* that are needed to define them. I've submitted
a patch to Marco, we'll see if he adds it.

darcs-hash:d664c932b6a9c885e22a9ebc22f079096f96cdb6