Add wayland backend

This adds a clutter backend for running under the wayland window system.
Initial cogl framebuffer integration by Robert Bragg.

clutter/wayland/clutter-wayland.h

@@ -0,0 +1,60 @@
+/*
+ * Clutter.
+ *
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Copyright (C) 2010  Intel Corporation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+ * Authors:
+ *  Matthew Allum
+ *  Robert Bragg
+ *  Kristian Høgsberg
+ */
+
+/**
+ * SECTION:clutter-wayland
+ * @short_description: Wayland specific API
+ *
+ * The Wayland backend for Clutter provides some Wayland specific API
+ *
+ * You need to include
+ * <filename class="headerfile">&lt;clutter/egl/clutter-wayland.h&gt;</filename>
+ * to have access to the functions documented here.
+ */
+
+#ifndef __CLUTTER_WAYLAND_H__
+#define __CLUTTER_WAYLAND_H__
+
+#include <glib.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+G_BEGIN_DECLS
+
+/**
+ * clutter_egl_display:
+ *
+ * Retrieves the <structname>EGLDisplay</structname> used by Clutter
+ *
+ * Return value: the EGL display
+ */
+EGLDisplay
+clutter_egl_display (void);
+
+G_END_DECLS
+
+#endif /* __CLUTTER_WAYLAND_H__ */