Delocalisation du formulaire pour les commentaires.
Reformatage des id pour les comments et le fieldset.
Tests OK.
Added spec to comments, they belong to themselves.
Added self reference to comments with root_id field.
Added index to comments root_id field.
Added some tests to Comment model.
Indent correct.
Added factory for comments with root.
Added specs for Comment model : validate presence of email, content and login.