HIGHLIGHTS of Germany’s new airship, Graf von Hindenburg, scheduled to make her first visit to the United States early in May. Passengers, 50, crew, 40. Staterooms (two-berth, air-conditioned, hot and cold running water), promenade, dining saloon, writing room on A deck; smoking room, bar, baths, kitchen, crew and officers’ mess, etc., on B deck. . . .