Finished install docs

["Justin C. Sherrill" <justin@xxxxxxxxxxxxxxxxxx>]

I finished out the install-from-live-cd section of the docs; here's the HTML
output:

http://www.forknibbler.com/guide/installation-cd.html

There's probably language typos as I haven't gone over it for structure. 
Please tell me if/when you see it.  Otherwise, I'll commit soon.