+ 0install 2.6.2
Add conflicts corresponding to the inverse of depopt constraints for Cohttp and Lwt

Should fix ocaml/opam-repository#1863, among other users of Lwt
Merge branch 'master' of git://github.com/camlunity/opam-repository into camlunity-master
Merge branch 'depopt-fixes' into camlunity-master
Merge pull request #1867 from avsm/camlunity-master

Lwt + 0install fixes