update read me file

git-svn-id: https://plugins.svn.wordpress.org/protect-wp-admin/trunk@1027248 b8457f37-d9ea-0310-8a92-e5e31aec5664
update read me file

git-svn-id: https://plugins.svn.wordpress.org/protect-wp-admin/trunk@1027249 b8457f37-d9ea-0310-8a92-e5e31aec5664
update read me file

git-svn-id: https://plugins.svn.wordpress.org/protect-wp-admin/trunk@1027250 b8457f37-d9ea-0310-8a92-e5e31aec5664