Added function in service to deal with get all pages of a specific type.
Added this function call to the admin controller.
Updated admin home to deal with being passed objects rather than just an array
Added delete page function to service.
Made delete page controller use service.
Made home page use new service for listing all pages.
Allowed twig sandbox access to page model.
Made page loader use page model instead of just passing the content.
Updated the README documentation for templating.