udating readme.txt

git-svn-id: https://plugins.svn.wordpress.org/users-ultra/trunk@901165 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed bug

git-svn-id: https://plugins.svn.wordpress.org/users-ultra/trunk@901166 b8457f37-d9ea-0310-8a92-e5e31aec5664