Updated description

git-svn-id: https://plugins.svn.wordpress.org/avectra-netforum-single-sign-on/trunk@856553 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme

git-svn-id: https://plugins.svn.wordpress.org/avectra-netforum-single-sign-on/trunk@856568 b8457f37-d9ea-0310-8a92-e5e31aec5664