onChatRoomPresence and showStatusMessages have been refactored to give more
detailed information and to also show the reasons given to actions taken by
moderators.

Also document the available chat room commands.

updates #62

* Update docs on message carbons and stanza forwarding.
* Mention latest bug fix.

See http://librelist.com/browser//conversejs/2014/8/26/problem-with-contact-list-everyone-is-offline/

updates #215

* Filter by both fullname and jid when searching for users to invite.
* Combine the confirm and prompt popups into a single confirm popup.
* Bugfix in groups filter. Make sure to show group that were previously filtered out.

Otherwise, if the same error presence is received twice, the form will render
twice.

Also, call the directInvite method on the XmppRoom obj of Strophe.MUC. This
will automatically include the room name and password.

* Fix filter predicates.
* Include contact JID in suggestions list