update to 3.2.1

git-svn-id: https://plugins.svn.wordpress.org/jetpack-gravatar-hovercards/trunk@1039100 b8457f37-d9ea-0310-8a92-e5e31aec5664
update readme.txt

git-svn-id: https://plugins.svn.wordpress.org/jetpack-gravatar-hovercards/trunk@1039104 b8457f37-d9ea-0310-8a92-e5e31aec5664