User version_compare for better comparison.
Do not rely on the "loader", so as to not have a dependency on ability to update PHP's include path at runtime.
Bug fix: a remote, relative protocol url might sanitise into a cache filename with a leading period.
Bug fix: reset properties to defaults after calling display() each time.
Refactor how we call from hook and evaluate if we should postpone.
Upgrade Minify 2.1.7, fixing a severe vulnerability.
Housecleaning only. Alpha order properties, change some to private. Add comments & debug info.
Restore registering Minify's loader.
Clarify our intentions.