Add episodes"

Reverts LaunchAcademy/south_park_reviews#23


"If you are using Rails 4 or later, you can simplify route definitions by using `concern`:

concern :paginatable do
  get '(page/:page)', :action => :index, :on => :collection, :as => ''
end

resources :my_resources, :concerns => :paginatable"

https://github.com/amatsuda/kaminari/blob/master/README.rdoc