Major changes in 3.31.91:
- Move nautilus properties page to nautilus module
- Fix fullscreen toolbar's appearance in RTL languages
- Update appdata and screenshots
- Don't advertise VCD support, GStreamer 1.0 has never supported it
- Add support for "start time" in playlists
- Make Ctrl+W navigate back before exiting
- Make it possible to load subtitles from the command-line
- Fix media player controls not appearing in gnome-shell in
  some cases, and the next/previous buttons not working
- Make previous/next buttons' state update when a movie
  contains chapters
- Use better labels for Subtitles and Languages menus
- Fix some display problems when files are longer than detected
- And other smaller bug fixes
  - Throw a warning when download buffering breaks because
    of a missing plugin
  - Make framerate more precise in properties
  - Fix a warning on exit when brasero is not installed