Configurators!

We're about to have a tarball of basic interpreter source (no compiler
yet, only an assembler).  Dan's already run into portability problems,
and once it comes out we're going to need to start working on the
configuration and build system.

Jarkko, are you still interested in leading this? (I'm unsure when jhi
returns from holiday, so don't take it as a 'no' if there's not an
immediate response).

Nat