fix bug on assigned attributes

lib/machinist/lathe.rb

@@ -6,12 +6,11 @@ module Machinist
   # The Lathe implements all the methods that are available to the blueprint,
   # including method_missing to let the blueprint define attributes.
   class Lathe
-    attr_reader :assigned_attributes
-
     def initialize(klass, serial_number, attributes = {}, overrided_attributes = {})
       @klass                = klass
       @serial_number        = serial_number
       @assigned_attributes  = {}
+      @attributes           = attributes
 
       @object               = @klass.new
       @overrides            = Overrides.new(self, attributes)
@@ -41,6 +40,10 @@ def overrides &block
       @overrides.instance_eval(&block)
     end
 
+    def assigned_attributes
+      @attributes
+    end
+
   protected
     def make_attribute(attribute, args, &block) #:nodoc:
       count = args.shift if args.first.is_a?(Fixnum)