Now the purple add-on's starting to come together with a clear
structure:
* Add-on sends IM_MESSAGES etc to the server for processing
* Server sends all (reply/etc) messages to add-on, which sends
to app
It's worth noting that on the add-on's side, no looper or handler is
used for receiving messages, it's all through sending serialized
BMessages to the add-on's connect_thread buffer.
PurpleAccounts are now reliably associated with Cardie's account names
and the thread ID of their respective connect_thread.
The GLib main-loop is gone over regularly thanks to a message runner.
Now, the add-on can log into/create accounts, connect to them, and send
the IM_PROTOCOL_READY notification to Cardie as appropriate.
Jaidyn Ann