[gnome-music] (20 commits) Created branch wip/jfelder/playlists-core-rewrite-prep-work

[Jean Felder <jfelder src gnome org>]

The branch 'wip/jfelder/playlists-core-rewrite-prep-work' was created.

Summary of new commits:

  c8e9cc2... playlistsview: Remove unused attribute _current_playlist_in
  cc25dea... playlists: Remove unused signal song-removed-from-playlist
  6ca1e76... playlists: Manage playlists deletion list internally
  6eff9f5... playlists: Make Playlist a GObject subclass
  a2b25d1... playlists: Add missing __repr__ method to Playlist class
  4a8ab62... playlists: Turn python-specific fields into GObject propert
  2eb68ea... playlists: Dynamically instantiate the smart playlists
  1d166cd... playlists: Add is_smart property to Playlist
  23d3bec... playlists: Add a SmartPlaylist class
  b0b849e... playlists: Manage playlists internally
  d7a20dc... playlists: Sort playlists
  cd2e70a... playlistdialog: Use the playlists managed by Playlists
  6f28e51... playlists: Introduce a ready property
  fad5b52... playlistsview: Move playlists instantiation in the class
  ac9eb97... playlistsview: Use the playlists managed by Playlists
  df13afc... playlists: Remove is_smart_playlist method
  2b13d22... mpris: Use the playlists managed by Playlists
  ac854ca... playlists: Remove unused signals
  eb3c114... playlists: reorder imports
  a32b33d... playlists: Update copyright header