[sushi] (49 commits) ...Use generated skeleton to export DBus interface

[Cosimo Cecchi <cosimoc src gnome org>]

Summary of changes:

  64e88b6... flatpak: use directory type in manifest (*)
  89647ae... text: simplify renderer state (*)
  9c214e1... evince: cleanup renderer state (*)
  83d60f7... application: fix coding style (*)
  e35e775... mainWindow: fix coding style (*)
  ea4fac8... image: fix error logging (*)
  21c398d... Don't use Clutter to position the toolbar (*)
  b1974f2... mainWindow: remove more dependencies on Clutter (*)
  ea62934... mainWindow: remove fullscreen animations (*)
  83e49ec... font-widget: don't force a minimum size (*)
  52b839e... Don't use Clutter to render the texture (*)
  e954524... media-bin: import SushiMediaBin for gstreamer playback (*)
  770af68... media-bin: adapt to Sushi design (*)
  8c4788f... media-bin: don't initialize style with class (*)
  f5d5c3e... media-bin: destroy video widget on sink deinit (*)
  7642b29... media-bin: add a size-change signal (*)
  0ac24ab... gst: use SushiMediaBin instead of ClutterGst (*)
  c62bf1a... fallbackRenderer: move function into only caller (*)
  aa62bc7... fallbackRenderer: ellipsize name label (*)
  b01f6db... fallbackRenderer: rework how the file icon is set (*)
  5d94008... Remove unused tweener.js (*)
  e6d02be... utils: remove unused code (*)
  0069189... Drop dependency on Clutter (*)
  2c73680... mainWindow: make a GtkWindow subclass (*)
  0934cea... audio: move function to only caller (*)
  fabfb4f... Adjust versioned imports (*)
  3addf17... Remove SpinnerBox (*)
  c22de0e... Remove prepare step from renderers (*)
  aeab5cd... Avoid instantiating all renderers at startup (*)
  ccd47a4... Make renderers GtkWidgets (*)
  beab9b3... mimeHandler: remove extra logging (*)
  f7b8ef2... Rework how toolbars are created (*)
  39f74d1... Change the way the main window is resized (*)
  e46a291... Stop using Lang.bind() (*)
  344e870... Clean up gi imports (*)
  37bcdfe... Port to ES6 classes (*)
  ce3721e... Simplify how renderers are registered (*)
  5a1b82e... Port to use package.js (*)
  6085409... Resize window when renderer is ready (*)
  8d92075... Make renderers control whether they can resize or not (*)
  ed251e7... Make moveOnClick() a property of the Renderer interface (*)
  fd7431d... image: simplify image renderer code (*)
  e28a942... Refactor how fullscreen state is stored (*)
  1cc52d0... image: improve scaling logic (*)
  838216e... Add an inactivity timeout to the application instance (*)
  a8fb574... Add "Open With" as a general feature (*)
  f1237d5... Consistently use display name for window title (*)
  e57e305... mainWindow: remove unneeded code (*)
  6f6b254... Use generated skeleton to export DBus interface (*)

(*) This commit already existed in another branch; no separate mail sent