readme update

git-svn-id: https://plugins.svn.wordpress.org/wpsso/trunk@934449 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme update

git-svn-id: https://plugins.svn.wordpress.org/wpsso/trunk@934450 b8457f37-d9ea-0310-8a92-e5e31aec5664
v2.5.0

git-svn-id: https://plugins.svn.wordpress.org/wpsso/trunk@935413 b8457f37-d9ea-0310-8a92-e5e31aec5664