Merge pull request #11 from gtcarlos/master

Adição de mensagem ao se cadastrar.
Added validation to post
Mudança do banco de dados principal para mysql
Fix some files
Fix background image
Fix css
Translate message for signed_up_but_unconfirmed pt-BR
Change route to users, change message for reset password, added a warning about changing some usernames
Fix warning message at login
Fix some routes and do not show users not confirmed
Fix collapse and delete post
organize application.js file
Fix application.js
Fix application.js
Fix config serve_static_assets
Gemfile atualizado devido à vulnerabilidades