update build system and README
We should have a release on opam ASAP so that we can point to it in the README. We could also have a "dev" version on opam for people that want to depend on that one, but not use our crazy opam.pins hack.
We should have a release on opam ASAP so that we can point to it in the README. We could also have a "dev" version on opam for people that want to depend on that one, but not use our crazy opam.pins hack.