Update to what Brandon has in octopress#1590.

https://github.com/imathis/octopress/pull/1590
Add in all those styles from Brandon.
I want the dark theme!
Update to latest in octopress#1590

https://github.com/imathis/octopress/pull/1590
https://github.com/imathis/octopress/commit/ddf78cc846e157fea5baf8be31ba15c2cff2b053