* clutter/clutter-script-private.h:
	* clutter/clutter-script.h:
	* clutter/clutter-script.c: Allow id-less objects: as long
	as they have a "type" member, a unique id will be provided.

	(json_object_end): Add merge id to the object information
	structure.

	(apply_behaviours), (add_children): Keep the unresolved
	objects around.

	(construct_stage), (clutter_script_construct_object): If an
	object has unresolved children or behaviours try resolving
	them when we ask for it.

	(json_parse_end), (clutter_script_ensure_objects): Ensure
	that the objects are fully constructed as best as we can when
	finished parsing.

	(object_info_free), (remove_by_merge_id):
	(clutter_script_unmerge_objects): Remove objects under the
	same merge id returned by the loading functions. (Fixes
	bug #558)