pretty links deprecated

git-svn-id: https://plugins.svn.wordpress.org/affiliates/trunk@898776 b8457f37-d9ea-0310-8a92-e5e31aec5664
added note

git-svn-id: https://plugins.svn.wordpress.org/affiliates/trunk@898778 b8457f37-d9ea-0310-8a92-e5e31aec5664