Update SZ-Google 1.5.1

git-svn-id: https://plugins.svn.wordpress.org/sz-google/trunk@786506 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update SZ-Google 1.5.1

git-svn-id: https://plugins.svn.wordpress.org/sz-google/trunk@787386 b8457f37-d9ea-0310-8a92-e5e31aec5664