OCaml package documentation

1. js_of_ocaml 5.6.0
2. js_of_ocaml-compiler 5.6.0
3. js_of_ocaml-lwt 5.6.0
4. js_of_ocaml-ppx 5.6.0
5. js_of_ocaml-ppx_deriving_json 5.6.0
6. js_of_ocaml-toplevel 5.6.0
7. js_of_ocaml-tyxml 5.6.0