Return information about the Mechanical Turk Service
        operations and response group NOTE - this is basically useless
        as it just returns the URL of the documentation

        help_type: either 'Operation' or 'ResponseGroup'

def get_help(self, about, help_type='Operation'):
        """
        Return information about the Mechanical Turk Service
        operations and response group NOTE - this is basically useless
        as it just returns the URL of the documentation

        help_type: either 'Operation' or 'ResponseGroup'
        """
        params = {'About': about, 'HelpType': help_type,}
        return self._process_request('Help', params)