Updated description and tags

git-svn-id: https://plugins.svn.wordpress.org/sign-up-sheets/trunk@911174 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updated description and tags

git-svn-id: https://plugins.svn.wordpress.org/sign-up-sheets/trunk@911177 b8457f37-d9ea-0310-8a92-e5e31aec5664