[GAE]python Channel API

在GAE上使用服务器推（Channel API）+聊天室示例
http://www.keakon.net/2010/12/03/%E5%9C%A8GAE%E4%B8%8A%E4%BD%BF%E7%94%A8%E6%9C%8D%E5%8A%A1%E5%99%A8%E6%8E%A8%EF%BC%88ChannelAPI%EF%BC%89+%E8%81%8A%E5%A4%A9%E5%AE%A4%E7%A4%BA%E4%BE%8B