Enabling autodiscovery

I've placed a link element in the header for the front-door page:

<link rel="alternate"
      type="application/atom+xml"
      href="http://www.cs.grinnell.edu/~stone/gist/index.atom"
/>

This makes it possible for aggregators to collect the feed information from the Web page.

At this point, the autodetection mechanism in the aggregator that I use, Sage, can find and load the Atom 0.9 feed that Lithium produces, exactly as generated.