Merge Sara Silva branch to trunk
Realizadas fabricações de tickets que já tinham...
Implementação do Sigleton na classe Servidor.
God Class in birdsong.client.FollowedUserListPanel
Closing #11 https://sourceforge.net/p/es2-2016-...
in birdsong.client.ReceivedMessageManager
Closingg #17 https://sourceforge.net/p/es2-2016...
Closing #17