Appraisal

Currently failing on 3.2.x, but I haven't spent much time figuring out why. Assuming my `travis.yml` changes work, you'll be able to see the failures there.

3.2.x also required a bit of hacking around Rails application configuration changes; I gutted the `eager_load_path`, cuz otherwise 3.2.x would *always* load the `Uncacheable` class and bomb out on boot.