Mirror of Angstrom demo images

Due to frequent requests, the Angstrom demo images are now mirrored to
provide additional bandwidth on days where the downloads are slow.
This doesn't help with Narcissus, but should help you get a set demo
image quicker.

See http://beagleboard.org/angstrom for more details.

Feel free to ping me with the list in CC if I the mirror gets out-of-date.

Given that Amazon S3 doesn't automatically search for index.html, you
might need to add that to the the end of your URL if you are trying to
browse subfolders.