Updating the "Tested up to" meta.


git-svn-id: https://plugins.svn.wordpress.org/slidedeck2/trunk@790163 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding YouTube Video to Plugin Description



git-svn-id: https://plugins.svn.wordpress.org/slidedeck2/trunk@793176 b8457f37-d9ea-0310-8a92-e5e31aec5664