Allow html in pagination labels

O use case é poder pôr html nas labels, por exemplo como abaixo:

    paginationOptions: {
        previousPageLabel: '<span class="icon-chevron-left"></span><span class="icon-chevron-left"></span>',
        nextPageLabel:     '<span class="icon-chevron-right"></span><span class="icon-chevron-right"></span>',
        previousLabel:     '<span class="icon-chevron-left"></span> Previous',
        nextLabel:         'Next <span class="icon-chevron-right"></span>'
    }