* riece-naming.el (riece-naming-assert-join): Rename signal 'join

* riece-naming.el (riece-naming-assert-join): Rename signal 'join
-> 'riece-naming-assert-join.
(riece-naming-assert-part): Rename signal 'part ->
'riece-naming-assert-part.
(riece-naming-assert-rename): Rename signal 'rename ->
'riece-naming-assert-rename.
(riece-naming-assert-channel-users): Rename from
riece-naming-assert-users; rename signal 'users ->
'riece-naming-assert-channel-users.

* riece-handle.el (riece-handle-topic-message): Emit
'riece-channel-set-topic signal.
(riece-parse-channel-modes): Emit 'riece-channel-toggle-operator,
'riece-channel-toggle-speaker, and 'riece-channel-toggle-modes signals.

* riece-display.el (riece-display-connect-signals): Rename some
signals; connect more signals.

* riece-300.el (riece-handle-302-message): Emit
'riece-user-toggle-away, and 'riece-user-toggle-operator signals;
don't update status indicators manually.
(riece-handle-301-message): Emit 'riece-user-toggle-away signal;
don't update status indicators manually.
(riece-handle-305-message): Ditto.
(riece-handle-306-message): Ditto.
(riece-handle-353-message): Follow the name change of
riece-naming-assert-users.
(riece-handle-324-message): Emit 'riece-channel-toggle-modes
signal; don't update status indicators manually.
(riece-handle-set-topic): Emit 'riece-channel-set-topic signal;
don't update channel indicator manually.
(riece-handle-352-message): Emit 'riece-user-toggle-away, and
'riece-user-toggle-operator signals; don't update status
indicators manually.