Fixing the install guide to have all the sections.

I don't know what was wrong with the [partintro] stuff, but it was preventing all other
sections from showing up. Other sections now show up.

Change-Id: I52657f66871dcfbbe652f3c1b0c22f6db8be8fad
Signed-off-by: Colin Dixon <colin@colindixon.com>
Merge "Fixing the install guide to have all the sections."