version 0.7 - various fixes

git-svn-id: https://plugins.svn.wordpress.org/mailchimp-for-wp/trunk@749323 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme

git-svn-id: https://plugins.svn.wordpress.org/mailchimp-for-wp/trunk@749326 b8457f37-d9ea-0310-8a92-e5e31aec5664