[ocaml-infra] Github: more repos moved to ocaml/ org

[Anil Madhavapeddy]

Dear all,

Following the earlier thread, several more repositories have been moved to the ocaml/ organisation:

By Xavier Leroy:
zarith
num
dbm

By Fred Bour:
merlin

By Louis Gesbert / Anil Madhavapeddy:
opam-publish

A new team has been created for merlin-dev, and the rest re-use existing ones.

The full list is at:
https://github.com/ocaml/infrastructure/wiki/OCaml-Project-Repositories

regards,
Anil