Updated readme

git-svn-id: https://plugins.svn.wordpress.org/refiral/trunk@892706 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme

git-svn-id: https://plugins.svn.wordpress.org/refiral/trunk@892707 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme

git-svn-id: https://plugins.svn.wordpress.org/refiral/trunk@892709 b8457f37-d9ea-0310-8a92-e5e31aec5664