Updated description

git-svn-id: https://plugins.svn.wordpress.org/sc-google-ranking/trunk@1053201 b8457f37-d9ea-0310-8a92-e5e31aec5664
update description

git-svn-id: https://plugins.svn.wordpress.org/sc-google-ranking/trunk@1053202 b8457f37-d9ea-0310-8a92-e5e31aec5664