Return a list of all routes.

def handle_json_GET_routes(self, params):
    """Return a list of all routes."""
    schedule = self.server.schedule
    result = []
    for r in schedule.GetRouteList():
      result.append( (r.route_id, r.route_short_name, r.route_long_name) )
    result.sort(key = lambda x: x[1:3])
    return result