it follows service-public.fr structure
- remove extraneous footer-link class
- remove extraneous space with `>` haml weird stuff
- homogenize json-style hash
- merge classes on ul
- use pseudo element for eye candy
* Use the existing Dossier#messagerie_available? method
* Raise when attempting to build a Commentaire if not messagerie_available?
* Disable the Messagerie form if not messagerie_available?
* Add tests :)
* Tweak the Horaires formatting while we’re here.