[clutter] (22 commits) Created branch multi-backend

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'multi-backend' was created.

Summary of new commits:

  d471a5f... Add a new GDK backend
  1c66cbf... Rework the interaction between the Cogl and GDK / X11 backe
  54777df... Implement multi-backend support
  3c8b630... Allow checking the backend type at run-time
  5e40876... Cosmetic fixes
  20efc67... gdk: Allow disabling event retrieval
  25d141d... gdk: Fix Stage foreign window support
  59d742b... Remove the X11-specific bit in ClutterStageCogl
  4b05cc4... Minimal cosmetic fix to the configure output
  9047e0e... Coding style and cosmetic fixes
  5071c8e... build: Move clutter-event-tslib.c out of egl/
  64d014b... build: Move EGL-related files under egl/
  3691ac0... egl: First attempt at cleaning up the EGL native backend
  4118504... gdk/events: Clean up the event handling code
  b86aea0... build: Improve the compat libs rule
  c16b3e6... build: Implement proper platform checking
  3d27867... docs: Update the README section on configure switches
  6c8c0ed... build: Make sure to remove colliding shared libraries
  778c8a6... Clean up the backend creation
  e1c1036... Clean up the windowing system defines
  b9178fa... interactive/devices: Build unconditionally
  f43686f... interactive/pixmap: Make sure to work only on the X11 backe