[mutter] (23 commits) Non-fast-forward update to branch wip/surface-content

[Jasper St. Pierre <jstpierre src gnome org>]

The branch 'wip/surface-content' 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:

  b5c93ee... cullable: Reset the culling state instead of skipping the t
  f6f8049... shaped-texture: Move unobscured_region processing here
  3374881... Always map the client and frame windows
  7a0e5b2... Move position-changed / size-changed signals to the MetaWin
  f534365... window-actor: Split into two subclasses of MetaSurfaceActor

Commits added to the branch:

  27ab516... cullable: Reset the culling state instead of skipping the t (*)
  f6db756... shaped-texture: Move unobscured_region processing here (*)
  a833666... shaped-texture: Fix unused variable warning (*)
  0ce64e4... build: Don't build client-protocols for things (*)
  8566566... xwayland: Split out the XWayland stuff into its own private (*)
  d694260... xwayland: Fix xwayland (*)
  912a0ab... wayland: Remove edges (*)
  0c213c8... wayland: Add support for the delete event (*)
  def5e86... wayland: Add support for the set_margin request (*)
  6561b53... display: Clean up screen management code (*)
  0c7a7d7... Disable clutter's high dpi scaling (*)
  ddaae9c... Fix build (*)
  6b66553... display: Remove unused variable (*)
  593db0b... default: Make the map animation more friendly (*)
  87b20d7... autogen.sh: use #!/bin/sh instead of #!/bin/bash (*)
  0638093... wayland-surface: Make set_fullscreen / set_maximized and fr (*)
  f16e9b2... wayland-surface: Make set_margin double-buffered as well (*)
  2be5401... window: fix invalid read in computing the input shape (*)
  0c5a6ad... window: don't set _NET_WM_FULLSCREEN_MONITORS to bogus valu (*)
  aec3edb... Always map the client and frame windows
  b9f1825... compositor: Delay meta_compositor_add_window until the firs
  54a6540... Move position-changed / size-changed signals to the MetaWin
  d9e0e9f... window-actor: Split into two subclasses of MetaSurfaceActor

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