Change layout for kanagawa regieonal ruby kaigi

神奈川Ruby会議のテーマを変更します


## PC
![image](https://cloud.githubusercontent.com/assets/916653/4344764/049995b6-40a4-11e4-88a4-df2aa1df2f62.png)

## Smartphone

![image](https://cloud.githubusercontent.com/assets/916653/4344762/f6b0f7aa-40a3-11e4-93a6-b18c7c09f4c7.png)