ROCHESTER — Fifty years ago, a new group home changed the way people with developmental disabilities and special needs live in Rochester. Hiawatha Homes began with a single home for children after two Rochester couples met and realized they shared similar experiences and needs. Today, more than 70 people live in 19 homes in the community with the support and medical care they need on hand. Cindy Ostrowski, chief executive officer of Hiawatha Hom…