Add a state_machine patch for rails 4.1.

config/initializers/state_machine_patch.rb

@@ -0,0 +1,9 @@
+# This is a patch to address the issue in https://github.com/pluginaweek/state_machine/issues/251
+# where gem 'state_machine' was not working for Rails 4.1
+module StateMachine
+  module Integrations
+     module ActiveModel
+        public :around_validation
+     end
+  end
+end