Typerex 1.99.1-beta

And a third ocp-build submission ! Ok, this one is a copy of Pierre's one, but using the workflow that we are building on top of ocp-opamer to opamize easily TypeRex components.

Also, this version of TypeRex should compile with ocaml 3.12.1, which is good since the limitation to ocaml 4.00.1 was not specified in the OPAM specification.