Pagination last page

First commit adds a link to the last page.![Screenshot_from_2015-09-17_20-29-00](https://gitlab.com/zj/gitlab-ce/uploads/dcd4f97b8b75c6725ed2a71ba86057b4/Screenshot_from_2015-09-17_20-29-00.png)

Unless there are less than 5 pages to show.![Screenshot_from_2015-09-17_20-34-31](https://gitlab.com/zj/gitlab-ce/uploads/2d730ad11306abcfa83c69627d4f6a7d/Screenshot_from_2015-09-17_20-34-31.png)

Also updates the `Kaminari` gem to the latest version, which is a minor update. [Changelog](https://github.com/amatsuda/kaminari/blob/master/CHANGELOG.rdoc)


See merge request !1334