Process the start of a node under xtvd/stations

def _startStationsNode(self, name, attrs):
        """Process the start of a node under xtvd/stations"""

        if name == 'station':
            self._stationId = attrs.get('id')
            self._callSign = None
            self._stationName = None
            self._affiliate = None
            self._fccChannelNumber = None