cleanup

git-svn-id: https://plugins.svn.wordpress.org/personal-content-recommendations/trunk@907902 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme

git-svn-id: https://plugins.svn.wordpress.org/personal-content-recommendations/trunk@907909 b8457f37-d9ea-0310-8a92-e5e31aec5664