Move content around

This moves the content I had written to "better places".

There are a couple of issues this brings up:

1. Since we're doing all the HTML by hand, it's pretty painful. We sure could use a templating engine that would make it easier to write, edit and maintain these docs.
2. I'm pretty sure the nav links are wrong--currently we'll have to check and edit them all by hand.

Anyhow, this just moves things around.

r?