Added tag cloud

git-svn-id: https://plugins.svn.wordpress.org/user-tags/trunk@912105 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated readme

git-svn-id: https://plugins.svn.wordpress.org/user-tags/trunk@912107 b8457f37-d9ea-0310-8a92-e5e31aec5664