Use the Federal Register API via http instead of the Ruby Gem

[ondrae]

What

Replace the Federal Register Ruby Gem with plain http requests to the API.

Why

The Federal Register Ruby Gem isn't feature complete. The two main missing features are:

• Filtering on TYPE: 'NOTICE' doesn't work. Our prototypes are full of non-notices.
• The data filter only takes exact days, not years like the API does. This is useful for exploring the data.

How

We are already using the httparty to make other web requests, use it to make these API calls as well. They have an example of how to turn it into its own class. Do that or just have big long ugly urls, that works too.