By Denny Dyroff, Entertainment Editor, The Times  Double Vision This will be a busy weekend at Uptown! Knauer Performing Arts Center (226 North High Street, West Chester, uptownwestchester.org). On January 7, Uptown! Knauer Performing Arts Center will host a show featuring the band Double Vision. The band’s name should give music fans an idea of what kind of music to expect. “Double Vision”...