No longer supports IE 6/7, Firefox < 4, and Safari < 5. * Make use of `inherit` to simplify some of the rules. * Remove a lot of padding and margin normalization, particularly for typographic elements, because modern browsers share common base styles. * Add `quotes` normalization. While all target browsers support `quotes`, they don't share a common set of quote styles. Opera and IE use "curly" quotes whereas other browsers do not. Browsers don't appear to set different quotes depending on the language (via the `lang` attribute) of the content. * Remove all list normalizations and they aren't needed anymore. * Remove a handful of form normalizations that targetted IE 6/7 or Firefox 3.