v0.2.3, 11/11/2014 -- Respect ignored paths even when already cached.
v0.2.2, 12/10/2014 -- Improved internals description in README. Added debug logging.
v0.2.0, 09/02/2013 -- Don't differentiate between page headers when caching.
v0.1.1, 07/20/2013 -- Added safety check for invalidation middleware.
v0.1.0, 07/09/2013 -- Initial release.
