Adicionado modelo usuario e comentario.
Merge branch 'master' of https://github.com/Bravi/bravi-ideas
Changed readme.
Fixed small problems with has_many in models
Configured authentication by Facebook
Fixed some js details
Configured routes for Comments and separeated the index route respond_to format (json and html)
Fixed merge error
Added email field to be saved when creating a new user from omniauth
Fixed css margin menu
Done all comments feature