added whole system from ola4doc

sys/node_modules/es5-ext/number/#/pad.js

@@ -0,0 +1,15 @@
+'use strict';
+
+var pad      = require('../../string/#/pad')
+  , toPosInt = require('../to-pos-integer')
+
+  , toFixed = Number.prototype.toFixed;
+
+module.exports = function (length/*, precision*/) {
+	var precision;
+	length = toPosInt(length);
+	precision = toPosInt(arguments[1]);
+
+	return pad.call(precision ? toFixed.call(this, precision) : this,
+		'0', length + (precision ? (1 + precision) : 0));
+};