[Typo3-documentation] Impovement of Wiki appearance

[Johannes Reichardt]

Hi there!

I would suggest a slight redesign of wiki.typo3.org - right now its hard 
to get a grip on it (basically it takes ages to get how you just add a 
completly word, even though its very easy for example).

Also the font and the typography in general looks weired on my computer, 
don´t know what that is but i could help on that if appreciated.

- Johannes