Corrected readme

git-svn-id: https://plugins.svn.wordpress.org/tieexpire-automated-post-expiry/trunk@799727 b8457f37-d9ea-0310-8a92-e5e31aec5664
Corrected readme (again, bah!)

git-svn-id: https://plugins.svn.wordpress.org/tieexpire-automated-post-expiry/trunk@799729 b8457f37-d9ea-0310-8a92-e5e31aec5664