Render full description RSS feeds

Hi @toolness,

I'm hoping to be able to read full description RSS feeds for http://planet.hivelearningnetworks.org/ so I can grab images from the feeds and display them on the [Hive Learning Networks Site](http://hivelearningnetworks.org/buzz/ "Hive Learning Networks Site") like this [mockup](https://www.dropbox.com/s/cktdon0m86x31rz/hive_revisedmockups_hivebuzz.png "Hive RSS feeds mockup").  Let me know if this PR looks fine.  Thanks :smiley: 

Mavis