fix for requirejs

Here is a simple test case using requirejs and bower : 
```javascript
require.config({
	paths: {
		'js-beautify': 'bower_components/js-beautify/js/lib'
	}
});
require([ 'js-beautify/beautify-html' ], function( html_beautify ) {
	console.log(html_beautify('<div>test</div>'));
});
```