added whole system from ola4doc

sys/node_modules/es5-ext/math/cbrt/implement.js

@@ -0,0 +1,6 @@
+'use strict';
+
+if (!require('./is-implemented')()) {
+	Object.defineProperty(Math, 'cbrt', { value: require('./shim'),
+		configurable: true, enumerable: false, writable: true });
+}

sys/node_modules/es5-ext/math/cbrt/index.js

@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = require('./is-implemented')()
+	? Math.cbrt
+	: require('./shim');

sys/node_modules/es5-ext/math/cbrt/is-implemented.js

@@ -0,0 +1,7 @@
+'use strict';
+
+module.exports = function () {
+	var cbrt = Math.cbrt;
+	if (typeof cbrt !== 'function') return false;
+	return cbrt(2) === 1.2599210498948732;
+};

sys/node_modules/es5-ext/math/cbrt/shim.js

@@ -0,0 +1,12 @@
+'use strict';
+
+var pow = Math.pow;
+
+module.exports = function (x) {
+	if (isNaN(x)) return NaN;
+	x = Number(x);
+	if (x === 0) return x;
+	if (!isFinite(x)) return x;
+	if (x < 0) return -pow(-x, 1 / 3);
+	return pow(x, 1 / 3);
+};