DENVER — Nazem Kadri and Mikko Rantanen scored, Pavel Francouz made 23 saves for his third career shutout and the Colorado Avalanche beat the Chicago Blackhawks 2-0 on Monday night to extend their franchise-record home winning streak to 16 games. It was the seventh straight victory overall for the Avalanche, who tied the 1976 Boston Bruins for the fifth-longest home …