Updates to readme

git-svn-id: https://plugins.svn.wordpress.org/gravity-forms-post-updates/trunk@985451 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updates to readme

git-svn-id: https://plugins.svn.wordpress.org/gravity-forms-post-updates/trunk@985459 b8457f37-d9ea-0310-8a92-e5e31aec5664