Blackberry's BBM learns from Snapchat, adds vanishing/retractable messages

In an effort to remain relevant among the number of chatting apps on people's smartphones today, Blackberry is overhauling its messaging service, BBM, with several new features that are clearly inspired by the popular Snapchat. While currently still in beta, the new update coming soon will introduce disappearing messages on a timer, as well as the ability to retract messages …