Jade pipe support (Feature Request)

I'd like to be able to write jade pipes…

```
* |jade
* #myDiv.myclass div content
*     p(style='border:1px solid red') paragraph inside div
* |jade end
```

which would output…

``` html
<div id="myDiv" class="myClass">
    <p style="border:1px solid red">paragraph inside div</p>
</div>
```

see [jade-lang.com](http://jade-lang.com/)
