Merge branch 'agpl-headers' into 'master'

app/builders/learning_object_builder.rb

app/controllers/application_controller.rb

app/controllers/concerns/deleted_objects_controller.rb

app/controllers/concerns/downloadable_controller.rb

app/controllers/concerns/followable_controller.rb

app/controllers/concerns/highlights_controller.rb

app/controllers/concerns/paginator.rb

app/controllers/concerns/publisher_controller.rb

app/controllers/concerns/resource_model.rb

app/controllers/concerns/reviewable_controller.rb

app/controllers/concerns/sociable_controller.rb

app/controllers/concerns/stageable_controller.rb

app/controllers/concerns/subjectable_controller.rb

app/controllers/concerns/taggable_controller.rb

app/controllers/v1/activities_controller.rb

app/controllers/v1/collections_controller.rb

app/controllers/v1/complaints_controller.rb

app/controllers/v1/contacts_controller.rb

app/controllers/v1/educational_stages_controller.rb

app/controllers/v1/feed_controller.rb