* libnautilus-extensions/nautilus-mime-actions.h: *
	libnautilus-extensions/nautilus-mime-actions.c:
	(nautilus_mime_get_short_list_components_for_uri,
	nautilus_mime_set_default_action_type_for_uri,
	nautilus_mime_set_default_application_for_uri,
	nautilus_mime_set_default_component_for_uri,
	nautilus_mime_set_short_list_applications_for_uri,
	nautilus_mime_set_short_list_components_for_uri,
	nautilus_mime_extend_all_applications_for_uri,
	nautilus_mime_remove_from_all_applications_for_uri): Implemented
	(they write the metadata and everything - happy fun).
	(str_list_difference): Helper function compied from gnome-vfs.

	* test/test-nautilus-mime-actions-set.c: Tests for these
	functions.
	* test/Makefile.am: Build it.