Perform a Yelp Neighborhood API Search based on a geopoint.

        Args:
          lat      - geopoint latitude 
          long     - geopoint longitude

def by_geopoint(self, lat, long):
        """
        Perform a Yelp Neighborhood API Search based on a geopoint.

        Args:
          lat      - geopoint latitude 
          long     - geopoint longitude  
        """

        header, content = self._http_request(self.BASE_URL, lat=lat, long=long)		
        return json.loads(content)