v2.1 plugin update

git-svn-id: https://plugins.svn.wordpress.org/auction-affiliate/trunk@979681 b8457f37-d9ea-0310-8a92-e5e31aec5664
Readme changelog tweak

git-svn-id: https://plugins.svn.wordpress.org/auction-affiliate/trunk@979715 b8457f37-d9ea-0310-8a92-e5e31aec5664