Changed the hashCode() and equals() methods for items so that the two directed versions of the same edge are considered equal.
Changed the hashCode() and equals() methods for items so that the two
directed versions of the same edge are considered equal.

BackupTheBerlios/gavrog,BackupTheBerlios/gavrog,BackupTheBerlios/gavrog,BackupTheBerlios/gavrog,BackupTheBerlios/gavrog