Add atom icon/button, palette-optimize RSS button
Add atom link in footer

I think this is the appropriate syntax for passing template args. Needs
testing.
Add atomicon.gif to file list
Merge pull request #279 from Lagg/master

Initial atom feed link code
Add atom link rels, update rsslink_journal to have a feed_type param
Merge pull request #280 from Lagg/master

Add atom link rels, update rsslink_journal to have a feed_type param