0.2.20
	* Removed accidental debugging `puts` calls from ActiveRecord backend

0.2.19
	* Added :force option to state and aggregate definitions, allowing you
		to force a method overwrite
	* Added an attribute_name alias to named scopes in the ActiveRecord
		backend, since Rails 3.1 has eaten up a number of previously
		usable state names

0.2.18
	* Ruby 1.9.2 and Rails 3.1 compatibility updates (no API changes)