[mutter] (10 commits) Non-fast-forward update to branch wip/mult-window-actors

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

The branch 'wip/mult-window-actors' 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:

 http://live.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  87fd065... window-actor: Remove outdated code path
  ef94dea... window: Add a simple meta_window_get_toplevel_xwindow utili
  73a45f5... window-actor: Remove (private) xwindow property
  b7eaad0... window-actor: Remove meta-screen property
  88d12fe... window-actor: Make the meta-window property construct-only
  254d664... Allow potentially supporting multiple MetaWindowActors per 
  a6d59d7... window-actor: Don't do any special initialization in _new

Commits added to the branch:

  55180f5... xrandr: ignore the error if setting the primary output fail (*)
  8530981... window-actor: Remove old unused APIs
  d5374dc... Move position-changed / size-changed signals to the MetaWin
  845ce2e... window-actor: Remove outdated code path
  c24c698... window: Add a simple meta_window_get_toplevel_xwindow utili
  a48d1f3... window-actor: Remove (private) xwindow property
  d470830... window-actor: Remove meta-screen property
  26077da... window-actor: Make the meta-window property construct-only
  5d0a19d... Allow potentially supporting multiple MetaWindowActors per 
  04fdaa0... window-actor: Don't do any special initialization in _new

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