Martha Clarke as made a career of movement. Now she cherishes stillness.
by Sarah Kaufman | SHERMAN, CONN. " Geese waddle across the road, cows cluster in the shade, yearlings stand around looking gorgeous. ¶ This is a world away from the avant garde. ¶ And that's just the way Martha Clarke, the avant-garde director and choreographer, wants it. ¶ "I don't go to a lot of shows," she says, steering her Mini Cooper through a curve as the gravel road swings past yet another farm. "Gi…