* clutter.symbols: Update with the new public symbols

	* clutter/clutter-script.h:
	* clutter/clutter-script-private.h:
	* clutter/clutter-script.c:
	(parse_signals), (json_object_end),
	(signal_info_free), (object_info_free): Parse the "signals"
	member for GObjects.

	(clutter_script_connect_signals),
	(clutter_script_connect_signals_full): Add new API for autoconnecting
	signal handlers using the UI definition files.

	* tests/test-script.c:
	* tests/test-script.json: Test signal autoconnection.