CocoaPods post fix

This is my proposal to style the list items in the blog discussed in https://github.com/travis-ci/travis-foundation/pull/32. The result is the following:

![screen shot 2014-03-25 at 17 12 11](https://f.cloud.github.com/assets/1048705/2514387/81bf8986-b438-11e3-98db-4e391488b201.png)

Moreover, the list item in the side menu is not affected:

![screen shot 2014-03-25 at 17 15 25](https://f.cloud.github.com/assets/1048705/2514413/c0ad07c2-b438-11e3-8961-ec09aed14f42.png)