Add function cdb_routing_with_waypoints

Add routing with waypoints functions to client and server. Includes
signature checks tests for the Postgresql functions and unit and
integration tests for the Python library.

Add client v0.6.0 and server v0.9.0

server/lib/python/cartodb_services/cartodb_services/mapzen/routing.py

@@ -33,11 +33,11 @@ class MapzenRouting:
         self._url = base_url
 
     @qps_retry
-    def calculate_route_point_to_point(self, origin, destination, mode,
+    def calculate_route_point_to_point(self, waypoints, mode,
                                        options=[], units=METRICS_UNITS):
         parsed_options = self.__parse_options(options)
         mode_param = self.__parse_mode_param(mode, parsed_options)
-        directions = self.__parse_directions(origin, destination)
+        directions = self.__parse_directions(waypoints)
         json_request_params = self.__parse_json_parameters(directions,
                                                            mode_param,
                                                            units)
@@ -67,11 +67,16 @@ class MapzenRouting:
 
         return json.dumps(json_options)
 
-    def __parse_directions(self, origin, destination):
-        return {"locations": [
-                {"lon": origin.longitude, "lat": origin.latitude},
-                {"lon": destination.longitude, "lat": destination.latitude}
-                ]}
+    def __parse_directions(self, waypoints):
+        path = []
+        for idx, point in enumerate(waypoints):
+            if idx == 0 or idx == len(waypoints) - 1:
+              point_type = 'break'
+            else:
+              point_type = 'through'
+            path.append({"lon": str(point.longitude), "lat": str(point.latitude), "type": point_type})
+
+        return {"locations": path}
 
     def __parse_routing_response(self, response):
         try: