Rails 2.1

Update to Rails 2.1 final.

vendor/rails/activemodel/lib/active_model.rb

@@ -0,0 +1,17 @@
+$LOAD_PATH << File.join(File.dirname(__FILE__), '..', '..', 'activesupport', 'lib')
+
+# premature optimization?
+require 'active_support/inflector'
+require 'active_support/core_ext/string/inflections'
+String.send :include, ActiveSupport::CoreExtensions::String::Inflections
+
+require 'active_model/base'
+require 'active_model/observing'
+require 'active_model/callbacks'
+require 'active_model/validations'
+
+ActiveModel::Base.class_eval do
+  include ActiveModel::Observing
+  include ActiveModel::Callbacks
+  include ActiveModel::Validations
+end