Allow cascade delete of apps and routes.

Many Openstack services such as Designate perform cascade deletes of resources, for instance in designate if you delete a domain / zone all records for that zone also get deleted. Could cascade deletes of apps be included in Piscasso? For example if I delete an app can all associates routes also get deleted, at the moment the API returns...

Unable to delete app demo_app-797d956bab374df3ab33c with routes (HTTP 403)

and I must recursively delete all routes before I can delete my app.