add all frontend files

node_modules/es-iterator-helpers/Iterator.concat/shim.js

@@ -0,0 +1,18 @@
+'use strict';
+
+var getPolyfill = require('./polyfill');
+var define = require('define-properties');
+
+var getIteratorPolyfill = require('../Iterator/polyfill');
+
+module.exports = function shimIteratorConcat() {
+	var $Iterator = getIteratorPolyfill();
+	var polyfill = getPolyfill();
+	define(
+		$Iterator,
+		{ concat: polyfill },
+		{ concat: function () { return $Iterator.concat !== polyfill; } }
+	);
+
+	return polyfill;
+};