* When using the javascript instant messenger screen, transmit outgoing messages...

* When using the javascript instant messenger screen, transmit outgoing messages to webcit using a real webcit command (new command: ajax_send_instant_message) instead of the ajax_server_cmd framework.  This gives us string unescaping for free, so we now escape all strings before transmitting them.  I was hoping this would fix the problem with sending non-ASCII characters through the instant messenger, but it didn't.  This will probably still be part of the solution though.