Add authorization system.

[:musical_note: Meganerd - ytcracker]
Remove secret token from repo.

[:musical_note: Radio - Alkaline Trio]
Add `simplecov` gem.

[:musical_note: Quite Exciting, This Computer Magic - Spraynard]
Rescue from AuthorizationSystem::NotAuthorized exceptions.

[:musical_note: On the Other Side - Justin Perkins]
Add specs for AuthorizationSystem module.

[:musical_note: Story of Reconversion - This is My Fist!]
Add feature specs.

[:musical_note: Cute Without The 'E' (Cut From The Team) - Taking Back Sunday]