WordPress 4.0 cat signal update

git-svn-id: https://plugins.svn.wordpress.org/cat-signal/trunk@981039 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme updates

git-svn-id: https://plugins.svn.wordpress.org/cat-signal/trunk@981056 b8457f37-d9ea-0310-8a92-e5e31aec5664