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

client/cdb_dataservices_client--0.6.0--0.5.0.sql

@@ -0,0 +1,5 @@
+--DO NOT MODIFY THIS FILE, IT IS GENERATED AUTOMATICALLY FROM SOURCES
+-- Complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "ALTER EXTENSION cdb_dataservices_client UPDATE TO '0.5.0'" to load this file. \quit
+DROP FUNCTION IF EXISTS cdb_dataservices_client._cdb_route_with_waypoints (text, text, geometry(Point, 4326)[], text, text[], text);
+DROP FUNCTION IF EXISTS cdb_dataservices_client.cdb_route_with_waypoints (geometry(Point, 4326)[], text, text[], text);