updated readme

git-svn-id: https://plugins.svn.wordpress.org/indieauth/trunk@792226 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed critical bug

git-svn-id: https://plugins.svn.wordpress.org/indieauth/trunk@792279 b8457f37-d9ea-0310-8a92-e5e31aec5664