adding some auto features

git-svn-id: https://plugins.svn.wordpress.org/responsive-ad-shortcodes/trunk@968366 b8457f37-d9ea-0310-8a92-e5e31aec5664
updating stable tags

git-svn-id: https://plugins.svn.wordpress.org/responsive-ad-shortcodes/trunk@968369 b8457f37-d9ea-0310-8a92-e5e31aec5664