AA Tree interface

aat_tree_t	* aat_create	( );aat_bool_t	  aat_destroy	( aat_tree_t * tree );aat_bool_t	* aat_init(	aat_tree_t			* tree,	aat_comparison_t	  (*compare			) ( const void *, const void *	),	void				* (*copy_data		) ( const void *				),	void				* (*copy_key		) ( const void *				),	void				* (*destroy_data	) ( const void *				),	void				* (*destroy_key		) ( const void *				));aat_node_t	* aat_extreme	( aat_tree_t * tree, aat_direction to_go		);aat_node_t	* aat_find		( aat_tree_t * tree, void * key					);aat_bool_t	* aat_insert	( aat_tree_t * tree, void * key, void * value	);aat_bool_t	* aat_remove	( aat_tree_t * tree, void * key					);aat_node_t	* aat_skew		( aat_node_t * node								);aat_node_t	* aat_split		( aat_node_t * node								);aat_node_t	* aat_rotate	( aat_node_t * node, aat_direction to_go		);