OCaml package documentation

1. irmin 2.0.0
2. irmin-chunk 2.0.0
3. irmin-fs 2.0.0
4. irmin-git 2.0.0
5. irmin-graphql 2.0.0
6. irmin-http 2.0.0
7. irmin-mem 2.0.0
8. irmin-mirage 2.0.0
9. irmin-mirage-git 2.0.0
10. irmin-mirage-graphql 2.0.0
11. irmin-pack 2.0.0
12. irmin-test 2.0.0
13. irmin-unix 2.0.0