Comment Screen

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

Why is there an inline style? And why don't you use
`.TopBarLayout-content.md-content.md-padding.u-fullSize` instead of the two divs?