Added a default cache expiration configuration option to the Kuva setup block.
Disable caching in the test environment.
Let's cache ALL THE THINGS (read: Flickr API calls). Too bad we don't have updated_at of an instance at each call otherwise it would have invalidated the cache automatically.
Let's use quotes everywhere. Why? Because I like them.
Let's use the environment variables (from .env) to fill in the Kuva setup block in the dummy application, so we can actually walk through the application in the development environment.