Beta 7 with some repo names changed.

Client/node_modules/es5-ext/error/is-error.js

@@ -0,0 +1,7 @@
+"use strict";
+
+var objToString = Object.prototype.toString, id = objToString.call(new Error());
+
+module.exports = function (value) {
+	return (value && (value instanceof Error || objToString.call(value) === id)) || false;
+};