Styling changes on tables and forms

Hi everyone,

After checking with Doug, I took the initiative of styling the wikitables to be the same as the browser compat tables, and styled the forms too, so that the edit page looks a bit nicer. 
One issue is that tables without the .wikitable class are currently unstyled, which will be solved.
If you notice any other issues or have feedback, we’re open to changes :)

Cheers,
Lea

Lea Verou
W3C developer relations
http://w3.org/people/all#lea ✿ http://lea.verou.me ✿ @leaverou