Import only Stream symbol from mod_pywebsocket.stream packet, not everything in it. Review URL: http://codereview.appspot.com/4431051
Import only Stream symbol from mod_pywebsocket.stream packet, not everything
in it.
Review URL: http://codereview.appspot.com/4431051

git-svn-id: a751b5b3dcfba0ee4592a85c40d2fdd063ca0d53@452 4ff78f4a-9131-11de-b045-6380ec9940d4

XiaonuoGantan/pywebsocket,XiaonuoGantan/pywebsocket