Use ActiveSupport::Concern in ActiveRest::Controller greatly simplifying the inclusion mess
Added support for additional headers in exception rescuer
Bumped version to 5.3.0
Implemented action authorization infrastucture. Also renamed find_target(s) to ar_retrieve_resource(s)
Renamed @target(s) to @resource(s) and model to ar_model
Various fixes for action_authorization
Various fixes for authorization
Various fixes after renaming
Further work on authorization layer