No jail for tree lovebirds BY BARBARA ROSSDAILY NEWS STAFF WRITER Two men arrested after a nearly-naked treetop tryst in Central Park last year got taken to the woodshed yesterday. But preoperative transsexual William Rund, 33, and boy toy Christopher Montero, 18, won't have to do any time behind bars. The ponytailed Rund got three years' probation, and Montero got five days of community service from a Criminal Court judge for the X-rated show they put on last April 22. "I did it out of love," said Rund, whose affair with Montero ran afoul of the teen's family as well...