Redesign website

I'd like some opinions on this redesign.  This is just a series of minor CSS tweaks, so it's all easy to adjust further.

I'm not sure how I feel about the small-caps or the uncentered layout (due to the now short and readable main content area).  I haven't figured out how to position the left sidebar as fixed to the top of the page but relatively centered with the rest of the content.

CC: @xuhdev @sindresorhus @jedhunsaker @bellkev @johan 

Opinions welcome from anyone.

![selection_054](https://f.cloud.github.com/assets/285352/981764/5fdf2ff0-0787-11e3-9bce-9492406fd0b4.png)