Refactored the #render method to work around an issue with Maruku.
Updated README.md to indicate necessity of Flickr API key.
Merge pull request #1 from wesleyjefferson/master
Refactored to use Flickr's API because of discontinued RSS feeds.
Corrections to make the plugin work again
It was using RSS feeds, but it seems that Yahoo no longer generates
them (or at least they are not available easily as it was before).