By Denny Dyroff, Entertainment Editor, The Times Chris Haas Chris Haas is coming back home – at least for a few days. Haas, who now lives in the Koreatown section of Los Angeles, graduated from Downingtown High in 2005. On November 3, Haas is returning to Chester County to perform a live comedy show. On Saturday evening, Kennett Flash (102 Sycamore Alley, Kennett Square, 484-732-8295, http://www.kennettflash.org)...