added whole system from ola4doc

sys/node_modules/es5-ext/string/#/code-point-at/shim.js

@@ -0,0 +1,26 @@
+// Based on: https://github.com/mathiasbynens/String.prototype.codePointAt
+// Thanks @mathiasbynens !
+
+'use strict';
+
+var toInteger  = require('../../../number/to-integer')
+  , validValue = require('../../../object/valid-value');
+
+module.exports = function (pos) {
+	var str = String(validValue(this)), l = str.length, first, second;
+	pos = toInteger(pos);
+
+	// Account for out-of-bounds indices:
+	if (pos < 0 || pos >= l) return undefined;
+
+	// Get the first code unit
+	first = str.charCodeAt(pos);
+	if ((first >= 0xD800) && (first <= 0xDBFF) && (l > pos + 1)) {
+		second = str.charCodeAt(pos + 1);
+		if (second >= 0xDC00 && second <= 0xDFFF) {
+			// http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
+			return (first - 0xD800) * 0x400 + second - 0xDC00 + 0x10000;
+		}
+	}
+	return first;
+};