Open tabs for rooms without autojoin (but do not join them)

Signed-off-by: Bertrand Marron <b@pk.am>
Use the new command scheme in plugins too

(while staying backwards-compatible)

Signed-off-by: Bertrand Marron <b@pk.am>
Add some documentation about message correction

Signed-off-by: Bertrand Marron <b@pk.am>
Also add the image…

Signed-off-by: Bertrand Marron <b@pk.am>
Fix get_version and get_room_form

Signed-off-by: Bertrand Marron <b@pk.am>