Fixes naming confusion regarding move_queue.

This restores the previous behaviour (changed in 6c5af1b107).
See discussion on fagga/transmission-remote-cli#102.
Also adds abilitty to move torrent to top or bottom of the queue.
Added abbility to move torrent queue to next/previous page.
Add some checks to Transmission.move_queue()
Move queue position with Shift-Left/Right by 10 instead of number of torrents per page