Fix #2241
missing space in the status plugin
Disable plugins on exit
Implement XEP-0118 (Fix #1840)

- Add new theming options
- Show the tune in the roster (both in contact line and infowin)
- add an option to show tunes as info messages
Implement user-tune publishing in the mpd plugin (#1840)
Stop broadcasting a tune if we are not playing (#1840)