(#13) Add 'Save to Library' to images from stories

![screen shot 2014-02-22 at 4 17 47 pm](https://f.cloud.github.com/assets/18567/2239020/34471188-9c0f-11e3-9e2c-fdbb49932254.png)
![screen shot 2014-02-22 at 4 17 54 pm](https://f.cloud.github.com/assets/18567/2239021/37769e6e-9c0f-11e3-8609-5047f2b4c820.png)