Docs additions to website

[Justin C. Sherrill]

Here's a slightly altered Docs page:

http://home.shiningsilence.com:81/Docs/

Links there go to Matt's presentation from October of last year at UCB
Berkley, and Jean-Marc Zucconi's recent benchmarks, updated with his redone
numbers for FreeBSD 5.2.

This is really three items submitted at once:
- Docs layout
- Benchmark page
- UCB Slides

I'll commit Monday, assuming no objections.