install gulp to process code

node_modules/bach/lib/parallel.js

@@ -0,0 +1,28 @@
+'use strict';
+
+var asyncDone = require('async-done');
+var nowAndLater = require('now-and-later');
+
+var helpers = require('./helpers');
+
+function iterator(fn, key, cb) {
+  return asyncDone(fn, cb);
+}
+
+function buildParallel() {
+  var args = helpers.verifyArguments(arguments);
+
+  var options = helpers.getOptions(args);
+
+  if (options) {
+    args = args.slice(0, -1);
+  }
+
+  function parallel(done) {
+    nowAndLater.map(args, iterator, options, done);
+  }
+
+  return parallel;
+}
+
+module.exports = buildParallel;