designate loupe mode as experimental

git-svn-id: https://plugins.svn.wordpress.org/featured-image-zoom/trunk@852510 b8457f37-d9ea-0310-8a92-e5e31aec5664
designate loupe mode as experimental

git-svn-id: https://plugins.svn.wordpress.org/featured-image-zoom/trunk@852512 b8457f37-d9ea-0310-8a92-e5e31aec5664
designate loupe mode as experimental

git-svn-id: https://plugins.svn.wordpress.org/featured-image-zoom/trunk@852516 b8457f37-d9ea-0310-8a92-e5e31aec5664