Write a really simple Service Worker example.
Add a simple echoing message handler to the service worker.
Use explicit ports and addEventListener to avoid missing Chrome features.
Add error reporting through self.onerror.
Add a way to log messages, and use it in the fetch event.
Update the live spec URL (now hosted via gh-pages!)
Merge pull request #207 from jyasskin/simple-demo

Write a really simple Service Worker example.
"actived" -> "activated" - fixes #211, thanks @inexorabletash