[mutter] (18 commits) Non-fast-forward update to branch wip/garnacho/touchpad-gestures

[Carlos Garnacho <carlosg src gnome org>]

The branch 'wip/garnacho/touchpad-gestures' 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:

  28c6606... events: Ensure touchpad gesture events go through clutter

Commits added to the branch:

  a3fbbaa... delete: Remove old code (*)
  1ea8efd... stack: Don't prefer windows in the same group as not_this_o (*)
  aacc3d5... shaped-texture: Repeat edge pixels instead of mirroring the (*)
  693456b... shaped-texture: Remove unnecessary copies of the pipeline (*)
  ccca810... window-group: Improve performance by hacking around Clutter (*)
  e8dd560... window-group: Turn clipped redraws back on (*)
  8979e52... Install enum types (*)
  fd443ec... plugin-manager: Clean up an unused define (*)
  7de1f3a... plugin-manager: Make the event an enum (*)
  9f04c58... Implement a generic "size change" mechanism (*)
  9fc1c91... window-actor: Replace no-shadow with a shadow-mode (*)
  2705c87... window-group: Fix issues when translated (*)
  b33a82e... Export the shadow factory (*)
  a191554... compositor: Export meta_shadow_factory_get_shadow to intros (*)
  1545d4e... Put G_GNUC_CONST at the end of the declarations (*)
  7dc0b0e... Remove gtk-doc (*)
  4d34196... window: Don't reference a dead function (*)
  78fc957... events: Ensure touchpad gesture events go through clutter

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