Include yepnope to load polyfills

The plan would be to write examples in Handlebars partials, include them in code blocks and include them inside script tags like this:
```html
<script>
IntlDocs.ready(function () {
 {{>partial}}
});
</script>
```
this is way too complex, yepnope has a very simple, and this script should be just a call to yepnope, and a callback to execute the logic we want, I don't understand what is this script/load/ready/flush thing we have in here.