3.9 readme update

git-svn-id: https://plugins.svn.wordpress.org/advanced-dates/trunk@894628 b8457f37-d9ea-0310-8a92-e5e31aec5664
3.9 readme update

git-svn-id: https://plugins.svn.wordpress.org/advanced-dates/trunk@894640 b8457f37-d9ea-0310-8a92-e5e31aec5664
3.9 readme update

git-svn-id: https://plugins.svn.wordpress.org/advanced-dates/trunk@894642 b8457f37-d9ea-0310-8a92-e5e31aec5664