Clinton Fills Top Posts, Keeping Reno
Pres Clinton fills more top posts; nominates William M Daley as Commerce Secretary, Rep Bill Richardson as chief delegate to United Nations, Charlene Barshefsky as Trade Representative and Gene Sperling to head National Economic Council; Clinton says Atty Gen Janet Reno will stay on for second term, as will Donna E Shalala, Secretary of Health and Human Services, and Carol M Browner, Administrator of Environmental Protection Agency; Lawrence H Summers is given seat on Economic Council; of major economic posts, only Labor Secretary still remains open; photos (M)