Example App API

/users/
	READ: returns a list of user ids
	CREATE: creates a new user
	Permissions:
		Owner: -
		Group("users"): read
		Group("administrative"): read, create
		Others: create

/users/:user_id
	READ: returns information about the given users profile
	UPDATE: changes the given users profile
	DELETE: delete the given users profile
	Permissions:
		Owner("<user>"): read, update, delete
		Group("administrative"): read, delete
		Others: read

/users/:user_id/posts
	READ: returns all post ids of the given users profile
	CREATE: creates a new post on the given users profile
	Permissions:
		Owner(inherit): read, create
		Group("<user>-friends"): read, create
		Group("administrative"): read
		Others: -

/users/:user_id/posts/:post_id
	READ: returns the given post on the given users profile
	UPDATE: changes the given post on the given users profile
	DELETE: deletes the given post on the given users profile
	Permissions:
		Owner("<user>"): read, update, delete
		Users("<owneruser>"): read, delete
		Group("<user>-friends"): read
		Group("administrative"): read, delete
		Others: inherit