WC compatibility in readme.txt

Hi,

Can you add the WC required in the readme.txt as it is stated in
http://docs.woothemes.com/document/create-a-plugin/

WC requires at least: 2.2
WC tested up to: 2.3

Because a site of mine lost the functionality and only a message was shown when activating. To make matters worst when you batch update plugins the message is not shown, if you have a lower version woocommerce.

https://wordpress.org/plugins/woocommerce-pay-for-payment/