By Denny Dyroff, Entertainment Editor, The Times Community Festival The arrival of summer is here and so is the arrival of a plethora of  fun outdoor family events. Now through June 21, the sights, sounds and smells of a summertime fair will be filling the air in Downingtown when Saint Joseph Church (338 Manor Avenue, Downingtown, 610-269-8294, www.stjoesfestival.com) hosts its 17th annual “Community...