Pair mode now joins the hosts wemux session, and does not allow independent movement between windows as it can lead to users getting separated when doing a normal pair session. Rogue mode mirrors the old Pair mode behavior, allowing users to go off on their own and work in their own windows.
wemux was killing the currently selected server as the $wemux prefix is not rebuilt during the stop command.
`wemux list` outputs a list of all running sessions prefixed with a number. `wemux join` and `wemux stop` can now be invoked with this number. `wemux join 3` or `wemux j 3` would join the third server on the list. `wemux stop` can now be passed either the number, or the session name. If no argument is passed it will default to stopping the current session.