Comment Screen

- Added comment screen

![untitled](https://cloud.githubusercontent.com/assets/4236592/5476413/8ff6e82e-8619-11e4-81e2-0a1f674bf03d.png)

If you can find a name that is able to contain both these properties, go for it. If not, move the transform and transition to a class called, for instance, `u-hideBottom`.