* Add ApplicationMetalController to relevant controllers
* Add request forgery protection to metal
* Remove logger call
* Add logger keyword and skip protect_from_forgery in test
* Uncomment main_image in test
* Replace current_user.id with efficient_current_user_id in high-leverage areas
* Update name of efficient_current_user_id
* Replace user_signed_in? in pageviews
* Remove unneeded ?