Travis CI status

[loxs]

@pmetzger @Drup - I added the Travis CI status banner but I don't seem to have any actual control over Travis CI itself, as I am not listed as ocaml-community member. Because of this in the Travis CI admin panel I don't see the calendar project.

Please have a look if you can run a new CI build and if the build will light up green.

[Drup]

It seems to be working: https://travis-ci.org/ocaml-community/calendar/builds

@loxs Try to refresh your list of repositories. It might take some time.

[loxs]

I see, let's close this once the status lights up green.