added whole system from ola4doc

sys/node_modules/es5-ext/number/is-safe-integer/shim.js

@@ -0,0 +1,11 @@
+'use strict';
+
+var isInteger = require('../is-integer/shim')
+  , maxValue  = require('../max-safe-integer')
+
+  , abs = Math.abs;
+
+module.exports = function (value) {
+	if (!isInteger(value)) return false;
+	return abs(value) <= maxValue;
+};