Added ice and stun_server settings to BonjourAccount and used them

darcs-hash:20090608141423-58103-9b8a0a8287d4bfc2410bbf6dc2fe87404b4d2511
Removed items from TODO

darcs-hash:20090608141800-58103-ceae85795547473a77564288de395e9687bcbf3a