Make the readme less hoxy-specific.
Correct the readme a little.
Add image to readme.
Don't go to network if respondWith has been called on a fetch event.

Fixes #6
Tweak hoxy rules.
Add postMessage and first serviceWorker page API stubs.

Fix #1
Use hide-key.
Add SW->page postMessage. Fix #1.
Remove the TODO file and clean up the README.
Add message event listening to the worker.
Cleanup and document somewhat.
Merge branch 'master' of https://github.com/phuu/serviceworker-demo