Got my Rails app all beautified with Twitter Bootstrap but I think I'm missing how to add [Bootstrap's responsive behavior](http://twitter.github.com/bootstrap/scaffolding.html#responsive) into the **asset pipeline**. 

Currently when I stretch my window it doesn't grow (or shrink, for that matter). 

I have added the viewport meta data in `<head>`:

```
<meta content='width=device-width, initial-scale=1.0' name='viewport'>

```

But, not quite sure how, or where, to add the stylesheet:

```
<link href="assets/css/bootstrap-responsive.css" rel="stylesheet">

```