解决 undefined method `cattr_accessor'

引用

http://stackoverflow.com/questions/3065166/cattr-accessor-not-working-outside-rails-when-active-support-is-required

./script/../config/../config/preinitializer.rb:21: undefined method `cattr_accessor' for HmConfig:Class (NoMethodError)
	from ./script/../config/boot.rb:28:in `load'
	from ./script/../config/boot.rb:28:in `preinitialize'
	from ./script/../config/boot.rb:10:in `boot!'
	from ./script/../config/boot.rb:108
	from script/server:2:in `require'
	from script/server:2

require 'active_support/all'