Fixing bugs with white on black version

Fixes bugs:

-You couldn't change back to black on white version once in white
on black.

-Link is now in the colours you'll get if you click it.
text size and acessibility improvements

Increased text size as reccomended and put the #content width in
EMs so it will scale on firefox.
Increased line height on menu so readable on /really/ small screens
(feature phones. What's "computer" in afrikaans?
Fixing spelling in index
Spelling in style.css
mergeing for acessibility
Merge pull request #64 from drcable/gh-pages

Fixing bugs with white on black version