readme updated v1.1

git-svn-id: https://plugins.svn.wordpress.org/wpu-shortlinks/trunk@984809 b8457f37-d9ea-0310-8a92-e5e31aec5664
change version number

git-svn-id: https://plugins.svn.wordpress.org/wpu-shortlinks/trunk@984811 b8457f37-d9ea-0310-8a92-e5e31aec5664