committing v1.8.1

git-svn-id: https://plugins.svn.wordpress.org/affiliates-manager/trunk@1042405 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme file

git-svn-id: https://plugins.svn.wordpress.org/affiliates-manager/trunk@1042406 b8457f37-d9ea-0310-8a92-e5e31aec5664