Serve basic pages from content-store

Get an item from the content store and display it on a page. Views are very basic at this point, and controller just passes the content hash directly to the page.

For future reference, Rails defines a bunch of symbols for [HTTP status codes](http://futureshock-ed.com/2011/03/04/http-status-code-symbols-for-rails/) which are handy for making the code more understandable, especially with the more obscure codes.