Spec: Remove version and more: https://github.com/slightlyoff/ServiceWorker/commit/73107aa6eba0046902ae7c71a75e9ebfe369b185
Spec: Tighten up the interface for clients: https://github.com/slightlyoff/ServiceWorker/commit/5af0d5a698a192070cbfda67ea862668a051550f
Spec: https://github.com/slightlyoff/ServiceWorker/commit/ab602bac39d79c5b8a084a5b6bac3140f773c8f5 in prose for now
Spec: Refine Response types: https://github.com/slightlyoff/ServiceWorker/commit/d8dbe8f6a032a9095eed923666af5ed87f424e3c