By Denny Dyroff, Entertainment Editor, The Times Cabaret The Resident Theatre Company (RTC) at Uptown! Knauer Performing Arts Center (236 North High Street, West Chester, http://www.rtcwc.org) has embarked on its third season and has started the journey with a musical that is guaranteed to be a crowd-pleaser – “Cabaret.” “We took an email survey last season to find out which shows audiences...