Stream site

        Accepted params found at:
        https://dev.twitter.com/docs/api/1.1/get/site

def site(self, **params):
        """Stream site

        Accepted params found at:
        https://dev.twitter.com/docs/api/1.1/get/site
        """
        url = 'https://sitestream.twitter.com/%s/site.json' \
              % self.streamer.api_version
        self.streamer._request(url, params=params)