Small CSS changes on /about.

- Add more padding to the constraint so things don't look as crammed.
- Border under <h1>'s for more separation.
- Move <li>'s over so their "dot" isn't on the constraint border.
- Some more padding around <h1> and <h2>'s.
Merge pull request #188 from fedora-infra/css-hax

Small CSS changes on /about.