GMP 5.1.0 — with new universal build strategy, works like a charm.

This my first commit, ever.

I think it should mostly? Be self explanatory. I tried to do some good inline documentation, but I got a little by the end. Anyway, I rewrote a whole new contraption that allows GMP detect hardware and to heavily optimize each architecture, then glue the two together. Passes all checks, works with autoenv, etc, etc. I've tested on 10.8, 10.6 and even 10.4 using the tigerbrew port.

More to come!~~ The Bathtub