Add the Negociator implementation
Add the Negociator implementation

This module is just an implementation in OCaml of the Git negociator.
But it's not very optimized and may be it's interesting to look about
the Bloom filter to implement a better negociation engine.

But, it's easy to replace it.

mirage/ocaml-git,mirage/ocaml-git,mirage/ocaml-git