* clutter/clutter-frame-source.c (clutter_frame_source_add)

	* clutter/clutter-frame-source.c (clutter_frame_source_add)
	(clutter_frame_source_add_full): Add gtk-doc and rename the
	'function' parameter to 'func'.

	* clutter/clutter-frame-source.h: Rename the 'function' parameters
	to 'func'.

	* clutter/Makefile.am (source_h): Make clutter-frame-source.h a
	public header.

	* clutter/clutter-main.c (clutter_threads_add_frame_source_full):
	Improve gtk-doc

	* doc/reference/clutter/clutter-sections.txt: Added
	clutter_threads_add_frame_source,
	clutter_threads_add_frame_source_full,
	clutter_frame_source_add and clutter_frame_source_add_full.