make FbGraph::Node handle AttributeAssigner without include it.

lib/fb_graph2/application.rb

@@ -1,7 +1,5 @@
 module FbGraph2
   class Application < Node
-    include AttributeAssigner
-
     register_attributes(
       raw: [
         :id, :android_key_hash, :app_domains, :auth_dialog_data_help_url, :auth_dialog_headline,
@@ -23,7 +21,6 @@ module FbGraph2
 
     def initialize(id, attributes = {})
       super
-      assign attributes
       # TODO: handle custom attributes.
     end
   end

lib/fb_graph2/attribute_assigner.rb

@@ -35,13 +35,13 @@ module FbGraph2
             when :page
               Page.new raw[:id], raw
             when :pages
-              Collection.new(raw).each do |_raw_|
+              Collection.new(raw).collect do |_raw_|
                 Page.new _raw_[:id], _raw_
               end
             when :profile
               as_profile raw
             when :profiles
-              Collection.new(raw).each do |_raw_|
+              Collection.new(raw).collect do |_raw_|
                 as_profile _raw_
               end
             when :user
@@ -55,6 +55,8 @@ module FbGraph2
       end
     end
 
+    private
+
     def as_profile(raw)
       klass = if raw.include?(:namespace)
         Application

lib/fb_graph2/node.rb

@@ -2,8 +2,13 @@ module FbGraph2
   class Node
     attr_accessor :id, :access_token, :raw_attributes
 
+    def self.inherited(klass)
+      klass.include AttributeAssigner
+    end
+
     def initialize(id, attributes = {})
       self.id = id
+      assign attributes if respond_to?(:assign)
     end
 
     def authenticate(access_token)

lib/fb_graph2/page.rb

@@ -1,7 +1,5 @@
 module FbGraph2
   class Page < Node
-    include AttributeAssigner
-
     register_attributes(
       raw: [
         :about, :attire, :band_members, :booking_agent, :can_post, :category, :checkins, :company_overview,
@@ -21,7 +19,6 @@ module FbGraph2
 
     def initialize(id, attributes = {})
       super
-      assign attributes
       # TODO: handle custom attributes.
     end
   end

lib/fb_graph2/post.rb

@@ -1,7 +1,5 @@
 module FbGraph2
   class Post < Node
-    include AttributeAssigner
-
     register_attributes(
       raw: [
         :caption, :description, :icon, :is_hidden, :link, :message, :name, :object_id, :picture,
@@ -19,7 +17,6 @@ module FbGraph2
 
     def initialize(id, attributes = {})
       super
-      assign attributes
       # TODO: handle custom attributes.
     end
   end

lib/fb_graph2/user.rb

@@ -1,7 +1,5 @@
 module FbGraph2
   class User < Node
-    include AttributeAssigner
-
     include Edge::Accounts
     include Edge::Friends
     include Edge::Feed
@@ -22,7 +20,6 @@ module FbGraph2
 
     def initialize(id, attributes = {})
       super
-      assign attributes
       # TODO: handle custom attributes.
     end