Add a configuration option to specify a cache store for DisplayCase
Add an implementation of a dumb cache to use as default
Move dumb default cache for use only in tests because having it is probably a dumb idea
Allow DisplayCase to use a cache if it was configured to use one
Introduce caching in the readme
Link to example of good key naming
clarify what interface we use for the cache store
use assert_in_delta instead of straight >
Merge branch 'caching' of github.com:objects-on-rails/display-case