* TagsController inherits from ApiController
* Let ApiController inherit from ActionController::Base to have its own lifecycle
* Remove unused method
* Use only one respond_to :json for the entire API
* ApiController inherits from ActionController::Base
* Use Pundit only where needed
* Added association between webhook_endpoints and oauth apps
* Limit webhooks access by oauth_app_id when authorized by doorkeeper
* Use rails route helpers in webhooks api test
* Fix webhook API and add POST /api/webhooks docs
* Document GET /api/webhooks/:id
* Fix DELETE /api/webhooks/{id} and document it
* Add proper 404 specs
