GETAWAYS • NYC Hotels Let’s begin with the word on a major new Manhattan hotel opening this week, and further downtown, an ongoing refresh: The Fifth Avenue Hotel (Nomad, above): A short block away from the Ritz-Carlton Nomad, The Fifth Avenue Hotel opened its doors Monday in a restored McKim, Mead & White mansion from 1907 — and an adjoining new 24-story tower. When FOUND dropped by to scope it out, we found an