Fixed readme styling

git-svn-id: https://plugins.svn.wordpress.org/header-login/trunk@875766 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed readme styling

git-svn-id: https://plugins.svn.wordpress.org/header-login/trunk@875767 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed readme styling

git-svn-id: https://plugins.svn.wordpress.org/header-login/trunk@875768 b8457f37-d9ea-0310-8a92-e5e31aec5664