Woo! Big misc commit. Baaad! :)

-Did some experiments last nigth with using img tag as background element for mobile. Currently commented out.
- Removed .sass-cached from repo. Hope that doesn't cause problems. Why was it included?
- Tweaks to tablet landscape layout are the biggest change -- set info-box to centred, tweaked width, nav-bar and titlebar elements, etc. Looks good.
Adds overflow: hidden for images set in hyperlinks.
Fix .nav-current font for phone views.
Fixed .nav-current for tablet and desktop views.