Persist install selection

:fork_and_knife: 

When a signed in user clicks the install instructions for a cookbook, persist their selection on their account.

todo:

- [x] update the installs view to be less nutso
- [x] get the feature spec passing

Trello card: https://trello.com/c/l7YoGfzK
@brettchalupa Could you just add the class to the `dl` tag? Like:

```erb
<dl data-tab data-options="deep_linking:true; scroll_to_content: false;" <%= if current_user? 'persist-install-method' %>>
```

Then make the event binding like:

```javascript
$(".persist-install-method dd a").click(function() {
});
```

Shouldn't add any logic other than that one ERB tag.