[gnome-music] (23 commits) Non-fast-forward update to branch wip/jfelder/playlists-core-rewrite-prep-work

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/playlists-core-rewrite-prep-work' was changed in a way that was not a fast-forward 
update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  88103c8... playlistsview: Remove unused attribute _current_playlist_in
  217d362... playlists: Remove unused signal song-removed-from-playlist
  85a5879... playlists: Manage playlists deletion list internally
  4bd92d8... playlists: Make Playlist a GObject subclass
  c76a594... playlists: Add missing __repr__ method to Playlist class
  bc964ad... playlists: Turn python-specific fields into GObject propert
  2d3f10b... playlists: Dynamically instantiate the smart playlists
  03393d0... playlists: Add is_smart property to Playlist
  98bfd53... playlists: Add a SmartPlaylist class
  49018f9... playlists: Manage playlists internally
  0318741... playlists: Sort playlists
  2a04ac0... playlistdialog: Use the playlists managed by Playlists
  6cba1a7... playlists: Introduce a ready property
  540a159... playlistsview: Move playlists instantiation in the class
  0834d9e... playlistsview: Use the playlists managed by Playlists
  0757a71... playlists: Remove is_smart_playlist method
  5f1ad29... mpris: Use the playlists managed by Playlists
  bd65f5e... grilo: Remove unused function populate_playlists
  a33b9ab... playlists: Remove unused signals
  7147eec... playlists: reorder imports
  b83ef31... playlists: Update copyright header

Commits added to the branch:

  4f7dcf9... query: Remove unused method clear_playlist
  2156c08... playlists: Remove unecessary method clear_playlist
  727d699... playlistsview: Remove unused attribute _current_playlist_in
  9aac221... playlists: Remove unused signal song-removed-from-playlist
  e4182d8... playlists: Manage playlists deletion list internally
  5aad022... playlists: Make Playlist a GObject subclass
  e8131e4... playlists: Add missing __repr__ method to Playlist class
  ba5bf8c... playlists: Turn python-specific fields into GObject propert
  2bf1f86... playlists: Dynamically instantiate the smart playlists
  3d84fc1... playlists: Add is_smart property to Playlist
  aa862a5... playlists: Add a SmartPlaylist class
  79def30... playlists: Manage playlists internally
  c26230a... playlists: Sort playlists
  3fc68c5... playlistdialog: Use the playlists managed by Playlists
  bbf1d83... playlists: Introduce a ready property
  13d510b... playlistsview: Move playlists instantiation in the class
  f1049ac... playlistsview: Use the playlists managed by Playlists
  a2db2ec... playlists: Remove is_smart_playlist method
  bacc7cf... mpris: Use the playlists managed by Playlists
  d3e6f39... grilo: Remove unused function populate_playlists
  a2085f7... playlists: Remove unused signals
  5b404cc... playlists: reorder imports
  64e55f4... playlists: Update copyright header