updated readme file

git-svn-id: https://plugins.svn.wordpress.org/kebo-social/trunk@887114 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme file again

git-svn-id: https://plugins.svn.wordpress.org/kebo-social/trunk@887115 b8457f37-d9ea-0310-8a92-e5e31aec5664