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

[Emmanuele Bassi <ebassi src gnome org>]

The branch 'multi-backend' was created.

Summary of new commits:

  18269e4... Add a new GDK backend
  7c81c6e... Rework the interaction between the Cogl and GDK / X11 backe
  3f108fe... Implement multi-backend support
  3cff9a7... Allow checking the backend type at run-time
  4a13176... Cosmetic fixes
  502444e... gdk: Allow disabling event retrieval
  26b8ddb... gdk: Fix Stage foreign window support
  30de02c... Remove the X11-specific bit in ClutterStageCogl
  9a8973f... Minimal cosmetic fix to the configure output
  faf2d91... Coding style and cosmetic fixes
  eabfb07... build: Move clutter-event-tslib.c out of egl/
  3a056ad... build: Move EGL-related files under egl/
  6fef36e... egl: First attempt at cleaning up the EGL native backend
  e708ec1... gdk/events: Clean up the event handling code
  79eb25e... build: Improve the compat libs rule
  2ddb60c... build: Implement proper platform checking
  95606c9... docs: Update the README section on configure switches
  efa678d... build: Make sure to remove colliding shared libraries
  0a5d07d... Clean up the backend creation
  8b0adb5... Clean up the windowing system defines
  0924ec1... interactive/devices: Build unconditionally
  1f826a7... interactive/pixmap: Make sure to work only on the X11 backe