Log gauges

        >>> client = StatsdClient()
        >>> client.gauge('example.gauge', 47)
        >>> client.gauge(('example.gauge41', 'example.gauge43'), 47)

def gauge(self, stats, value):
        """
        Log gauges

        >>> client = StatsdClient()
        >>> client.gauge('example.gauge', 47)
        >>> client.gauge(('example.gauge41', 'example.gauge43'), 47)
        """
        self.update_stats(stats, value, self.SC_GAUGE)