version 2.40 - cool styling and translation

git-svn-id: https://plugins.svn.wordpress.org/wp-invites/trunk@1036580 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed screenshots

git-svn-id: https://plugins.svn.wordpress.org/wp-invites/trunk@1036582 b8457f37-d9ea-0310-8a92-e5e31aec5664