added whole system from ola4doc

sys/node_modules/es5-ext/math/expm1/shim.js

@@ -0,0 +1,16 @@
+// Thanks: https://github.com/monolithed/ECMAScript-6
+
+'use strict';
+
+var exp = Math.exp;
+
+module.exports = function (x) {
+	if (isNaN(x)) return NaN;
+	x = Number(x);
+	if (x === 0) return x;
+	if (x === Infinity) return Infinity;
+	if (x === -Infinity) return -1;
+
+	if ((x > -1.0e-6) && (x < 1.0e-6)) return x + x * x / 2;
+	return exp(x) - 1;
+};