* Add comment for public controllers
* Add block policy and specs
* Add policy for authorizing dashboard
* Add follow policy and specs
* Refactor a tiny bit
* Prevent banned users from following anything
* Add a note for email sub controller about auth
* Add image upload policies
* Add policy for github repos
* Fix typo and use correct github repo variable
* Fix image uploader and use regular params
* Add authenticate_user before action back in
* Rename test
* Update slack bot message formatting and fix reported URL
