Add solution for delivery query strings when uri_segment is numeric

If want delivery query strings and want set uri_segment is numeric in slash path,
Then I should set config below.

```php
// URL: http://localhost/test/2?keyword=pagination
		$config = array(
			'pagination_url' => '/test/{page}?'.http_build_query(Input::get()),
		    'total_items' => 100,
		    'per_page' => 10,
		    'uri_segment' => 2,
		);

```

But I think better setting is below.

```php
		$config = array(
			'pagination_url' => '/test/',
		    'total_items' => 100,
		    'per_page' => 10,
		    'uri_segment' => 2,
		    'query' => Input::get(),
		);
```

Some argue that there is a problem with the design URI, But, for example, I think when doing renovations add GET parameters to the existing management systems, this feature that is needed.