deer park update system

Ben and Darin gave a quick demo of their Firefox Update work last week and today I was able to update from yesterday's nightly Deer Park build to this morning's Deer Park build using the new Update system.

I just created a short video clip of the update process and as soon as I edit it down so it's not such a huge file, I'll get it posted.

This isn't fully enabled in the nightly builds just yet. One of us will be posting over at the Mozilla QA blog when we're ready for more widespread testing.