Changed minimum versions.

Queue was implemented in transmission 2.4 (RPC 14), so previous
versions should not work.
Implemented sorting by queuePosition.
Implemented increasing and decreasing queuePosition.
Help message for increasing/decreasing torrent queue position.
Added option to change queue sizes.
Compability fix.

Turns out it wasn't nescessary to increase minimum version, only add some if rpc_version >= 14.
Changed queue adjustment keys to shift-j/k because ctrl-j (\n) is already used
Show queue position for waiting torrents
Sort options in options dialog