Reads the kml file, parses it and updated the Google transit feed
    object with the extracted information.

    Args:
      filename - kml file name
      feed - an instance of Schedule class to be updated

def Parse(self, filename, feed):
    """
    Reads the kml file, parses it and updated the Google transit feed
    object with the extracted information.

    Args:
      filename - kml file name
      feed - an instance of Schedule class to be updated
    """
    dom = minidom.parse(filename)
    self.ParseDom(dom, feed)