Made many changes to setup.html

[Robert Collins]

----- Original Message -----
From: "Christopher Faylor" <cgf@redhat.com>
>
> I can't imagine why you'd argue with that.  I assume that you aren't
> actually arguing with it.

With that I'm not. I read what you'd written three times and got the
same meaning each time, which was that 'b' was not a direct dependency.
I should get more sleep I think. Anyway I note you've added a new
paragraph, and I'm happy with whats there now. Sorry for my confusion.

Rob