BBM adds message retraction, timed messages to free version

BlackBerry has updated its BlackBerry Messenger client across Android, iOS, and BlackBerry 10 with some useful new features.The main new feature here is message retraction. You can now retract messages after sending them, or even edit them. This can be useful if you sent something by mistake and don't wish the other person to see it. This works in one on one chats as well as group chats.BBM also