Rssparser @techpeace @ornellasm

Right now the rss feed parser works thusly:

FeedEntry model uses Feedzirra to fetch and parse a feed url.  Right now I am using the console to run the `update_from_feed(feed_url)` method.  A `feed_controller` defines an `index` method and `feed/index.html.erb` display's formatted feeds.

The feed index lives at /forums but there is not a link to it yet (wanted to wait until I had it properly functioning).  Also, there is no UI for adding an rss feed.  Still trying to figure out user/admin story in order to understand how I want set up the UI.