Moved Rails plugins required by the core to lib/plugins.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9533 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/plugins/acts_as_versioned/test/fixtures/widget.rb

@@ -0,0 +1,6 @@
+class Widget < ActiveRecord::Base
+  acts_as_versioned :sequence_name => 'widgets_seq', :association_options => {
+    :dependent => :nullify, :order => 'version desc'
+  }
+  non_versioned_columns << 'foo'
+end