[Feature] Add pagination

[Nyholm]

Make sure we use pagination on blog posts, videos and the author/tag index pages.

<!-- Pagination -->
    <ul class="pagination pull-right">
        <li><a href="#">&laquo;</a></li>
        <li class="active"><a href="#">1</a></li>
        <li><a href="#">2</a></li>
        <li><a href="#">3</a></li>
        <li><a href="#">4</a></li>
        <li><a href="#">5</a></li>
        <li><a href="#">&raquo;</a></li>
    </ul>
    <div class="clearfix"></div>