deleted the Readme.txt

git-svn-id: https://plugins.svn.wordpress.org/sagepay-form-payment-gateway-for-gravity-forms/trunk@1008365 b8457f37-d9ea-0310-8a92-e5e31aec5664
added the readme.txt

git-svn-id: https://plugins.svn.wordpress.org/sagepay-form-payment-gateway-for-gravity-forms/trunk@1008367 b8457f37-d9ea-0310-8a92-e5e31aec5664