* configure.ac: Added a --with-flavour option to select between

	* configure.ac: Added a --with-flavour option to select between
	x11 and win32 versions. Defaults to x11.

	* clutter-gtk/gtk-clutter-embed.c: ifdef out X11 specific calls
	and replace with Win32 equivalents.
	(gtk_clutter_embed_key_event, gtk_clutter_embed_button_event): Set
	the stage pointer when generating fake Clutter events otherwise
	they just get ignored.
	(gtk_clutter_embed_realize): Always request button and key events
	in the window event mask. They aren't included by default on
	Windows.

	* README (Requirements): Added a note about the minimum Clutter
	version for the Win32 backend.