By Denny Dyroff, Entertainment Editor, The Times There will be a bustle of activity in Downingtown on September 30 when the 12th Annual Downingtown Fall Fest (East Lancaster Avenue between Wallace Avenue and Green Street, Downingtown, 610-514-7000, http://downingtownfallfest.com) arrives. The popular street festival, which runs from 11 a.m.-4 p.m. and will be held rain or shine, will feature live music,...