code: function(file) {
      return Bluebird.props({
        stream: fs.createReadStream(file),
        size: fs.statAsync(file).get('size'),
        transform: Bluebird.resolve(new PassThroughStream())
      });
    }
docs: @summary Handle plain uncompressed images
  @function
  @public
  @memberof handlers
  
  @param {String} file - file path
  @fulfil {Object} - image metadata
  @returns {Promise}