removed old demo slider

git-svn-id: https://plugins.svn.wordpress.org/makeslider/trunk@972011 b8457f37-d9ea-0310-8a92-e5e31aec5664
added new demo slider

git-svn-id: https://plugins.svn.wordpress.org/makeslider/trunk@972012 b8457f37-d9ea-0310-8a92-e5e31aec5664