Fixing the menu highliting

Hi all,

the first commit removes the static active class from home.
The second commit adds highliting based on the current page back in again. I dunno how to properly make helpers/partials with HAML/Webmachine so there's a bit of duplication but I think it suites its purpose.

If anyone knows how to handle this current menu item highliting better, I'd be intrigued to know about it :-D

Shoes on!
Tobi