Ferrero International S.A., the Italian chocolate company best known for its decadent Nutella hazelnut spread, has big plans for the Fannie May and Harry London brand chocolates it quietly bought earlier this year. The deal also included fanniemay.com's online business, 79 retail stores in the Midwest, two warehouses and distribution centers in Chicago and in Maple Heights, Ill., and about 750 employees company-wide.