README.md in dm-is-authenticatable-0.1.1 vs README.md in dm-is-authenticatable-0.1.2

@@ -20,15 +20,18 @@
     class User
   
       include DataMapper::Resource
 
       is :authenticatable
+
+      property :id, Serial
     
       # Name of the Licence
       property :name, String
     
     end
+    DataMapper.finalize
   
     user = User.new(:name => 'bob')
     user.password = 'secret'
     # => "secret"
 
@@ -54,12 +57,37 @@
     # => true
 
     User.authenticate(:name => 'bob', :password => 'secret')
     # => #<User: ...>
 
+Using dm-is-authenticatable with [Warden](http://github.com/hassox/warden#readme):
+
+    Warden::Manager.serialize_into_session { |user| user.id }
+    Warden::Manager.serialize_from_session { |id| User.get(id) }
+    
+    Warden::Strategies.add(:password) do
+      def valid?
+        # must specify both name and password
+        params['name'] && params['password']
+      end
+ 
+      def authenticate!
+        attributes = {
+          :name => params['name'],
+          :password => params['password']
+        }
+
+        if (user = User.authenticate(attributes))
+          success! user
+        else
+          fail! 'Invalid user name or password'
+        end
+      end
+    end
+
 ## Requirements
 
-* [bcrypt-ruby](http://rubygems.org/gems/bcrypt-ruby) ~> 2.1
+* [bcrypt-ruby](http://rubygems.org/gems/bcrypt-ruby) ~> 3.0, >= 2.1.0
 * [dm-core](http://github.com/datamapper/dm-core/) ~> 1.0
 * [dm-types](http://github.com/datamapper/dm-types/) ~> 1.0
 * [dm-validations](http://github.com/datamapper/dm-validations/) ~> 1.0
 
 ## Install