Pack swagger-ui (as a ZIP) inside the jaxrs-doclet and then write the contents of the UI alongside the service JSON files.

This makes it so users don't have to pack their own swagger-ui.
Update the sample application to use relative URLs now that swagger-ui has been hacked up to allow that sort of thing.
Unused imports. Let's make travis-ci happy, again.
Update the example in the README to use relative URLs.

Relative URLs are better. They work whether you're testing locally, on your staging environment, in production, on the moon, underwater…you get the picture.