Cal Performances' biennial Berkeley Edge Fest is dedicated to presenting works of contemporary music and performance. Starting this Thursday (June 7) and running through Sunday June 10 at Zellerbach Hall, the Edge Fest seems to be pushing an anti-Bush theme this year. Oh, they're just giving the people of Berkeley exactly what they want to hear! This year, the Edge Fest is featuring a musical theater piece by Paul Dresher called The Tyrant, based on......