OCaml 3.10.0 Beta in Experimental

As per title.

It isn't actually fully functional: Julien for example just noticed that ocamlc -version returns "3.10.0+beta" while the libdir is (correctly) /usr/lib/ocaml/3.10.0/, this means that practically all packages using the ocaml CDBS class can't be built properly against it.

Still you can give it a try (if you love risk) and perhaps document yourselves on the new API of camlp4, which changed completely. For us it will be useful to see the result of experimental autobuilding ... I'm quite scared about that!