Add endpoints to routes table (location lists)

[ezwelty]

Users can organize locations into ordered collections, named "routes", and display these on a map with Google Map directions overlaid. This feature is buried in the interface and very rarely used.

This feature should be rebranded and the emphasis on routing removed, but otherwise the existing data can be reused.

• GET user/locations/lists - Get user's location lists
• POST locations/lists – Create a list
• PUT locations/lists/{id} – Update a list
• DELETE locations/lists/{id} – Delete a list
• POST locations/{id}/lists/{id} – Add location to list
• DELETE locations/{id}/lists/{id} – Remove location from list
• GET locations/{id} – For authenticated users with lists, should return membership in lists.