Replace the copyright with CC

I just picked a lenient CC license.  Open to comments
I concur with the sentiment, but this will be used in the following phrase in the footer:

```
© Copyright 2011, Dave Dash, Laura Thompson, Jeff Balogh, Mozilla Webdev Team.
```

I would thus probably say "Mozilla. This work [...]"

Because the copyright, whether you want it or not, lies with Mozilla. Afterwards, we license it freely (and so we should).