Add set [background, speed, and emotion] blocks to k1 simplified studio freeplay

At http://localhost:8000/studio?locale=en_us&dir=ltr&level=k1_studio_simple&skin=studio

(zoomed out in browser)

![image](https://cloud.githubusercontent.com/assets/206973/3528472/d06bff06-078f-11e4-9a21-15a031b0a806.png)