1. Organize controllers using a module.
2. Use namespaced routes.

We're going to add some administrative functions to our song library. Using what we learned about namespaced routes and module scope, we'll organize our controllers and routes under an admin namespace to keep them separate from the regular user functions.

The base application has been provided with tests. Make sure to run rake db:seed to set up seed data. Tests can be run with rspec.

Note: Since we're building new features on an existing project that already has tests, part of the job is to make sure the tests that already pass at the beginning still pass when you're done!

1. Create a Preference model that will store preferences for the app. It will need to have fields for:
   • Allowing creation of new songs. Used to control the ability to add new songs to the system.
   • Allowing creation of new artists. Used to control the ability to add new artists to the system. Note: There will only be 1 instance of Preference, not a preference associated with each artist/song. After creating the model, run rake preferences:load so that your code will work in the browser.
2. Create a PreferencesController, routes, and views. Do this under an Admin module to separate it from the standard user functionality.
3. Update the songs#new and artists#new actions to check that creating new songs or artists is enabled, and redirect to /songs and /artists, respectively, if that preference is disabled.
4. Make sure tests pass.