The "room" template has been split into two seperate
templates― "join_room" and "create_room". Before, "room" was used in the
room creation window, but now that's delegated to "create_room".
"join_room" is used with the join window― so now, the add-on has total
control over the slots used to join/create rooms generally, if they
specify the templates. Even a "/join" command could be overriden by the
add-on.
Also, default templates are now in use. Rather than add-ons being
required to specify templates, there are sensible defaults included with
Cardie for each one.
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