Use puzzle image in feedback dialogs for jigsaw

![image](https://cloud.githubusercontent.com/assets/1767466/2684197/a3207e08-c1b4-11e3-9c52-2d594180aee0.png)
![image](https://cloud.githubusercontent.com/assets/1767466/2684259/7c9c0d0a-c1b5-11e3-8cee-edc69250805b.png)

Instead of having an avatar, use the image from the puzzle.