code: def read(uid)
        object = bucket.objects[uid]
        data = object.read
        meta = Serializer.json_decode(object.metadata[:json])
          [
            data,     # can be a String, File, Pathname, Tempfile
            meta      # the same meta Hash that was stored with write
          ]
      end
docs: # Retrieve the data and meta as a 2-item array