[gtk] (24 commits) Non-fast-forward update to branch wip/otte/paintable

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/paintable' 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:

  e674f0f... gtk: Add GtkMediaStream
  8b01815... gtk: Add GtkMediaFile
  e30099d... mediafile: Turn into an extension point
  4907a75... build: Add ffmpeg requirement
  005c204... gtk: Add ffmpeg implementation of GtkMediaFile
  2954c1c... gtk: Add GtkMediaControls
  07bc383... gtk: Add GtkVideo
  1a4562b... gtk-demo: Add a video example (with controls) to the images
  38d5d04... demos: Add a video benchmark to widgetbowl demo
  4aeb591... gtk-demo: Add paintable demo
  2ad85e7... demos: Add an animated paintable demo
  4e6a6d3... demos: Round up the paintable demos with a media stream
  b95245b... build: Add gstreamer dependency
  7c614e3... gtk: Add a GStreamer implementation to GtkMediaFile
  1586d97... gtk-demo: Add a simple video player example
  f2839cd... css: Add initial support for Houdini-style paint() images
  021d15e... THIS IS EVIL DEMO CODE, DO NOT LOOK AT IT.
  017ae7a... build: Make GStreamer backend the default

Commits added to the branch:

  146082d... Notebook: Don’t show raw underline/markup in popup (*)
  e30ba1d... gdk: Remove gdk_texture_new_from_data()
  4bef77a... gdk: Add GDK_MEMORY_DEFAULT
  10e1520... texture: Expose subclasses as subclasses
  939e466... gtk: Add GtkMediaStream
  427bce6... gtk: Add GtkMediaFile
  bd25c41... mediafile: Turn into an extension point
  a09667d... build: Add ffmpeg requirement
  ffe4b66... gtk: Add ffmpeg implementation of GtkMediaFile
  98bfd8e... gtk: Add GtkMediaControls
  7e22264... gtk: Add GtkVideo
  2a8d7f8... gtk-demo: Add a video example (with controls) to the images
  074c829... demos: Add a video benchmark to widgetbowl demo
  4fc1ea9... gtk-demo: Add paintable demo
  433c714... demos: Add an animated paintable demo
  b9b84b3... demos: Round up the paintable demos with a media stream
  22e7298... build: Add gstreamer dependency
  01158f4... gtk: Add a GStreamer implementation to GtkMediaFile
  3797b7e... gtk-demo: Add a simple video player example
  50373a9... css: Add initial support for Houdini-style paint() images
  08bf8a6... THIS IS EVIL DEMO CODE, DO NOT LOOK AT IT.
  8dde331... build: Make GStreamer backend the default
  fa62485... mediastream: Add gtk_media_stream_realize/unrealize()
  c45ec8e... media: Add support for OpenGL to GtkGstMediaFile

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