Omake mode 1.1.

- Works with ocaml 4.0
- Works with Janestreet core 109.45
- Much better installation support
- Tested on 3 linux distros
Relax core restrictions to allow for OSX release.
Mac opam is still at core 109.42.00.
Dummy stub inotify support for osx.  This allows opam projects that build
,e.g. on linux with inotify support, and mac without inotify support.
Merge branch 'inotify-osx'
Merge branch 'omake-mode'