Attachments support.

git-svn-id: https://plugins.svn.wordpress.org/wp-ses/trunk@997928 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version fix.

git-svn-id: https://plugins.svn.wordpress.org/wp-ses/trunk@997929 b8457f37-d9ea-0310-8a92-e5e31aec5664