Dokumentation hinzugefügt

annotation gem installiert und Dokumentation in app/doc eingefügt

app/models/role.rb

@@ -1,3 +1,15 @@
+# == Schema Information
+#
+# Table name: roles
+#
+#  id            :integer          not null, primary key
+#  name          :string(255)
+#  resource_id   :integer
+#  resource_type :string(255)
+#  created_at    :datetime         not null
+#  updated_at    :datetime         not null
+#
+
 class Role < ActiveRecord::Base
   has_and_belongs_to_many :users, :join_table => :users_roles
   belongs_to :resource, :polymorphic => true