travis: add build for OCaml 4.00.1

Signed-off-by: John Else <john.else@citrix.com>
Merge pull request #12 from johnelse/travis-ocaml-4.00.1

travis: add build for OCaml 4.00.1
Update link in README

Signed-off-by: John Else <john.else@citrix.com>
Update .merlin

Signed-off-by: John Else <john.else@citrix.com>