News section tweaks

Here’s a few tidbits of polish to help with mojombo/jekyll#1093.

Screenshot:
![2013-07-08 at 4 49 pm](https://f.cloud.github.com/assets/296432/762360/036209e8-e7e6-11e2-87b1-c8995e8fe2bf.png)

@parkr I’ve actually got to head out just now, so don’t have time to write up the changes in depth, sorry! Most of them should be pretty obvious though if you fire up the site locally and browse around. Let me know if you have any questions! :smiley: 

/cc @benbalter