code: function streamOutput( callback ) {
  	return function(err, filenames) {
  		if (err) {
  			callback(err, null);
  		} else {
  			// Create read streams from each input
  			var streams = []
  			for (var i=0; i<filenames.suffix.length; i++)
  				streams.push([
  					fs.createReadStream( filenames.basename + filenames.suffix[i]),
  					filenames.suffix[i]
  				]);
  			// Callback with streams
  			callback(err, streams);
  		}
  	}
  }
docs: Read resulting bundle and return a stream with it