2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* Node.pm (document_id): New method.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* Graph.pm (get_node_by_id): New method.
	(create_node): Changed to instantiate SWE::Object::Node.

	* Node.pm: New module.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* Graph.pm: New module.

2009-03-15  Wakaba  <wakaba@suika.fam.cx>

	* ChangeLog: New file.