fix QQMixin and add 'get_openid' method
fix QQMixin and add 'get_openid' method

ymero/sinaweibopy,lynnegithub/sinaweibopy,xingguang2013/sinaweibopy,CodeJuan/sinaweibopy,shengnwen/sinaweibopy,liujianpc/sinaweibopy,frankblack7410/sinaweibopy,virqin/sinaweibopy,ZhQYuan/sinaweibopy,fiona22/sinaweibopy,wandouqiang/sinaweibopy,foolself/sinaweibopy,michaelliao/sinaweibopy,qazmichaelgw/sinaweibopy,weixiaofeng1987/test,JayYangSS/sinaweibopy