Revert "Renomeando ExistingUserAccount para ExistingUserAccountException"

This reverts commit b3aa562bcb720d76577507e2303d299e5759c761.
Desfazendo revert
Merge remote-tracking branch 'upstream/master'
Alteração para fazer rollback quando esta exception for lançada
Fix the save language
Merge pull request #56 from georgemayko/master

Fix the languages save
Merge pull request #55 from danielsoro/master

Alteração para que exception ExistingUserAccountException faça rollback quando lançada
Issue #40: Events visualization in difference levels
Merge branch 'master' of github.com:htmfilho/yougi
Check if HTTP Status the request of the gravatar is 404
Check if HTTP Status the request of the gravatar is 404
Merge pull request #59 from danielsoro/master

Validate gravatar image request.
Issue #40: Events visualization: sessions and their speakers.
Merge branch 'master' of github.com:htmfilho/yougi
Issue #40: Show all sessions and speakers of sub events in the parent event.
Issue #40: Show all attendees of sub events in the parent event.
Issue #40: Show all tracks of sub events in the parent event.
Issue #40: Session visualization.
Issue #40 Entity classes to support the organisation of sessions in slots.
Issue #64: Support for French added, but the translation is not finished yet.