Example for hook_luceneapi_sort_arguments_alter() has wrong sort type

Hey Chris,

This is a real small issue. The example for hook_luceneapi_sort_arguments_alter() in luceneapi.api.php reads:

$sort = array('created', SORT_NUMERIC, SORT_DESC, 'title', SORT_STRING, SORT_ASC);

But I think it's supposed to be "title_sort" instead:

$sort = array('created', SORT_NUMERIC, SORT_DESC, 'title_sort', SORT_STRING, SORT_ASC);

Took me a few minutes to realize why my override wasn't working. Does it even make sense to add patches for this kind of thing, or is it easier for you like this?