Soco

- Add search caching and indexed playback for 'list_albums'
- Add search caching and indexed playback for 'search_artists'
- Add '--docs' option to print URL to online documentation
- Add 'soco-discover' synonym for 'sonos-discover'
- Add line_in 'right_input' parameter for stereo paired P:5/Fives
- Behaviour change: Line-In starts playback after being selected

- Improve output from 'track' action for non-queue items
- Add 'cue_favourite_radio_station' action

- Add 'queue_last_search_number' action

- Add 'play_next' option to 'queue_track' and 'queue_album'
- Add 'play_next' option for 'add_playlist_to_queue'
- Add 'play_next' option for 'add_favourite_to_queue'

- Add 'remove_current_track_from_queue' action
- Add 'remove_last_track_from_queue' action

- Add the ability to use sequences and ranges with 'remove_from_queue'