set page by last part of slug
extract restricted slug names to a constant
raise ActiveRecord::RecordNotFound if missing parents
rescueing ActiveRecord::RecordNotFound with custom template
title layout helper
improve pages#index view aspect
removing json builders for pages
moving ActiveRecord::RecordNotFound catch for pages to its control
title helper for pages#show view
nested_page_path helper to account for ancestors in page path
enclose new page link in <p>
using ancestry rails 4 friendly branch
moving navbars to application views folder
using a custom presenter for menu