Hide storypackge at desktop breakpoint if only has one item

As we show the first item of curated story packages in the right hand column at desktop breakpoints we should hide the story-package to avoid duplication.

#### Before
![screenshot from 2014-01-13 12 31 54](https://f.cloud.github.com/assets/80089/1900320/124537de-7c4f-11e3-8473-47e52f388cfe.png)

#### After
![screenshot from 2014-01-13 12 32 16](https://f.cloud.github.com/assets/80089/1900322/17eda0c2-7c4f-11e3-8708-fd6f31cdc722.png)