CSS for HTML output

[Paul W. Frields]

Pursuant to the following bug:

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=159147

...I made some changes to the CSS in the Docs Project CVS.  Rahul was
looking (correctly, Karsten and I think) for a look that would
differentiate our docs from Red Hat's.  Most of our style sheet comes
from the one that Red Hat uses, in particular the coloration of headings
and admonitions.

I moved the headings to a blue color taken directly from the Fedora web
site CSS (the sidebar, to be more specific), and for the admonition
boxes, I came up with a yellow that is hopefully attention-getting
without being garish.  I left the coloration of screen sections alone
since there wasn't a clear reason to change it.  Refer to a mock-up here
to avoid having to build anything yourself:

http://docs.frields.org/mirror-tutorial-en/sn-planning-and-setup.html

If I can speak for Karsten, pursuant to a conversation we had today, we
would like to know what people think about adopting this CSS for DocBook
generated pages on the fedora.redhat.com web site.