Pagination fix

Adds support for Pagination and upgrades Bootstrap to latest version.
As above comment:

Empty div not needed. For offset columns, use `col-{size}-offset-{amount}`, i.e.

```html
<div class="col-md-12 hero-unit">
    <div class="col-md-6 col-md-offset-3">
        <!-- stuff -->
    </div>
</div>
```