Adds HTML structure.

It is possible to see content in the web page.

![image](https://cloud.githubusercontent.com/assets/168136/2690016/1a3e7244-c32a-11e3-9ee5-aefc7b252e2f.png)

![image](https://cloud.githubusercontent.com/assets/168136/2690031/6e2f70a6-c32a-11e3-8b4e-90096f4bcfe4.png)

[#69181170]