Discussions about merge request 3

[Robert Goldman]

Elias requests we merge this sooner, rather than later, as he has to go
off-line for several days.  I'll try to get this done tomorrow, but my
review will probably be sub-ideal, since I really am not fully on top of
this very complex chunk of code (aside from the tests, I've only really
used it on SBCL and ACL).

I'd particularly like feedback from Faré, obviously, and opinions about
whether it's ready for a merge.

Thanks,
r