Updated pagination system

I've updated the pagination system to the current version of filter.js.

As before you have to add two containers to the HTML: One to render the pagination in (default:  '.pagination'), a second one to display if no results are found (default: '#noresults').
There are no required changes in the plugin initialization itself, but you can configure the default options there:

```
{
    perPage: 12,
    range: 5,
    prevText: '&laquo;',
    nextText: '&raquo;',
    pagination_container: '.pagination',
    noresults_container: '#noresults'
} 
```