modify forward ,add ngql query,add test
modify format and notes,package Date.java and modify it at Util.java,delete some useless method at Encoding.java,modify path judge at Path.java,add PathType.java,PathDirection.java,modify some HashMap to Map.
modify format and notes,package Date.java and modify it at Util.java,delete some useless method at Encoding.java,modify path judge at Path.java,add PathType.java,PathDirection.java,modify some HashMap to Map.