Making the >ul >li configurable

Makes the use of lists optionally. Useful when using a CMS which does not provide list based content. 

With this pull request you will be able to use any other elements. E.g.:

```javascript
$('.banner').unslider({
	arrows: true,
	fluid: true,
	dots: true,
	container: '>.article',
	items: '>.content'
});

```