added whole system from ola4doc

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

@@ -0,0 +1,6 @@
+'use strict';
+
+if (!require('./is-implemented')()) {
+	Object.defineProperty(Math, 'expm1', { value: require('./shim'),
+		configurable: true, enumerable: false, writable: true });
+}

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

@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = require('./is-implemented')()
+	? Math.expm1
+	: require('./shim');

sys/node_modules/es5-ext/math/expm1/is-implemented.js

@@ -0,0 +1,7 @@
+'use strict';
+
+module.exports = function () {
+	var expm1 = Math.expm1;
+	if (typeof expm1 !== 'function') return false;
+	return expm1(1).toFixed(15) === '1.718281828459045';
+};

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;
+};