Add Atom and RSS feeds for posts. #4
Add feeds for existing content types. Resolves #4
Remove HTMLEntities gem. No longer needed. #4 #10
Reduce duplication of "base_url + " in code. Create url_for helper instead.
Add feedable concern, reducing duplication between Link and Post models.
Change concner HTMLable to Htmlable, allows for easier autoloading of concerns.
Change date format :rss to :rfc822. #4 #10