updating readme for 3.9

git-svn-id: https://plugins.svn.wordpress.org/remove-comment-notes/trunk@896257 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating readme for 3.9

git-svn-id: https://plugins.svn.wordpress.org/remove-comment-notes/trunk@896260 b8457f37-d9ea-0310-8a92-e5e31aec5664