Update README to include current gem install instructions for Rails 3.
Update README to include current gem install instructions for Rails 3.
chase439/chargify_api_ares,elfotografo007/chargify_api_ares,wsmoak/chargify_api_ares,carsonreinke/chargify_api_ares,chargify/chargify_api_ares,outstand/chargify_api_ares