note on including the polyfills when using ES6

README.rst

@@ -41,6 +41,8 @@ To compile ES6 code to ES5 for everyday usage you can use ``dukpy.babel_compile`
     ... ''')
     '"use strict";\n\nvar _prototypeProperties = function (child, staticProps, instanceProps) { if (staticProps) Object.defineProperties(child, staticProps); if (instanceProps) Object.defineProperties(child.prototype, instanceProps); };\n\nvar _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } };\n\nvar Point = (function () {\n    function Point(x, y) {\n        _classCallCheck(this, Point);\n\n        this.x = x;\n        this.y = y;\n    }\n\n    _prototypeProperties(Point, null, {\n        toString: {\n            value: function toString() {\n                return "(" + this.x + ", " + this.y + ")";\n            },\n            writable: true,\n            configurable: true\n        }\n    });\n\n    return Point;\n})();\n'
 
+**NOTE:** When using the BabelJS compiler for code that needs to run in the browser, make sure to add https://cdnjs.cloudflare.com/ajax/libs/babel-core/4.6.6/browser-polyfill.js dependency.
+
 Using the JavaScript Interpreter
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