Add margin to form inputs and button.

![coderdojo - san francisco-2](https://f.cloud.github.com/assets/623/2291402/06188d1e-a03d-11e3-983f-9ac3be68c353.jpg)
![coderdojo - san francisco-3](https://f.cloud.github.com/assets/623/2291405/11fedbb0-a03d-11e3-8608-1e487fa3303c.jpg)