added ControllerAdditions for easier reponder handling.

README.markdown

@@ -15,35 +15,27 @@ Easily render resources using representers with the built-in responder.
 
 ```ruby
 class SingersController < ApplicationController
+  include Roar::Rails::ControllerAdditions
   respond_to :json
 
   def show
     singer = Singer.find_by_id(params[:id])
     respond_with singer
   end
-
-  def self.responder
-    Class.new(super).send :include, Roar::Rails::Responder
-  end
-
 end
 ```
 
 Need to use a representer with a different name than your model? Pass it in using the `:with_representer` option:
 
 ```ruby
 class SingersController < ApplicationController
+  include Roar::Rails::ControllerAdditions
   respond_to :json
 
   def show
     singer = Musician.find_by_id(params[:id])
     respond_with singer, :with_representer => SingerRepresenter
   end
-
-  def self.responder
-    Class.new(super).send :include, Roar::Rails::Responder
-  end
-
 end
 ```
 

lib/roar-rails.rb

@@ -15,7 +15,7 @@ module Feature
 
 module Roar
   module Rails
-    # Your code goes here...
     autoload("TestCase", "roar/rails/test_case")
+    autoload("ControllerAdditions", "roar/rails/controller_additions")
   end
 end

lib/roar/rails/controller_additions.rb

@@ -0,0 +1,11 @@
+module Roar::Rails
+  module ControllerAdditions
+    extend ActiveSupport::Concern
+
+    module ClassMethods
+      def responder
+        Class.new(super).send :include, Roar::Rails::Responder
+      end
+    end
+  end
+end

lib/roar/rails/responder.rb

@@ -4,6 +4,7 @@ def extend_with_representer!(resource, representer=nil)
       representer ||= representer_for_resource(resource)
       resource.extend(representer)
     end
+
     def display(resource, given_options={})
       if resource.respond_to?(:map!)
         resource.map! do |r|
@@ -15,7 +16,8 @@ def display(resource, given_options={})
       end
       super
     end
-    private
+
+  private
     def representer_for_resource(resource)
       (resource.class.name + "Representer").constantize
     end

test/responder_test.rb

@@ -2,6 +2,7 @@
 
 Singer = Struct.new(:name)
 class SingersController < ActionController::Base
+  include Roar::Rails::ControllerAdditions
   respond_to :json
 
   def explicit_representer
@@ -18,11 +19,6 @@ def collection_of_representers
     singers = [Singer.new("Bumi"), Singer.new("Bjork"), Singer.new("Sinead")]
     respond_with singers
   end
-
-  def self.responder
-    Class.new(super).send :include, Roar::Rails::Responder
-  end
-
 end
 
 class ResponderTest < ActionController::TestCase