Add test_regions.json to demonstrate standalone regions and shop lists;
  region desert_test: A barren area near the Salton Sea that was half
    abandoned even before civilization went south.
  terrain t_searth_test: scorched earth
  furniture t_mutcactus_test: mutated cactus. It's like mutated poppy, only not.
  oterrain t_restaurant_deserted_test: yet-another-fast-food-joint, only the food and
    any hope of such is long gone.