New group events for intercom

lib/stats.js

@@ -142,6 +142,9 @@ exports.create = function(options) {
       user_login:  true,
       join_room: true,
       create_room: true,
+      create_group: true,
+      join_group: true,
+      leave_group: true,
       user_added_someone: true,
       new_invited_user: true,
       invite_accepted: true,