added URL field for show info

git-svn-id: https://plugins.svn.wordpress.org/add-art/trunk@1031357 b8457f37-d9ea-0310-8a92-e5e31aec5664
version change

git-svn-id: https://plugins.svn.wordpress.org/add-art/trunk@1031360 b8457f37-d9ea-0310-8a92-e5e31aec5664