Sets the time on the pyboard to match the time on the host.

def sync_time(self):
        """Sets the time on the pyboard to match the time on the host."""
        now = time.localtime(time.time())
        self.remote(set_time, (now.tm_year, now.tm_mon, now.tm_mday, now.tm_wday + 1,
                               now.tm_hour, now.tm_min, now.tm_sec, 0))
        return now