add tag

git-svn-id: https://plugins.svn.wordpress.org/lightbox/trunk@982754 b8457f37-d9ea-0310-8a92-e5e31aec5664
edit readme.txt

git-svn-id: https://plugins.svn.wordpress.org/lightbox/trunk@982761 b8457f37-d9ea-0310-8a92-e5e31aec5664
add tag

git-svn-id: https://plugins.svn.wordpress.org/lightbox/trunk@982762 b8457f37-d9ea-0310-8a92-e5e31aec5664