Update ChatExchange
Update ChatExchange

Pull in https://github.com/Manishearth/ChatExchange/commit/9fadf167a0a7be13ed9dd243943bc2daa507116c

ArtOfCode-/SmokeDetector,Charcoal-SE/SmokeDetector,ArtOfCode-/SmokeDetector,Charcoal-SE/SmokeDetector,NickVolynkin/SmokeDetector,NickVolynkin/SmokeDetector