Update UI in accordance with Android design guidelines

Screenshots are the best explanation to this patch.

Vertical:

![v1](https://cloud.githubusercontent.com/assets/8256809/5113648/617bf788-7042-11e4-82b4-56aa75d1f44b.png) ![v2](https://cloud.githubusercontent.com/assets/8256809/5113650/6310c6f0-7042-11e4-8510-d2279a2bfa2b.png)

Horizontal:

![h1](https://cloud.githubusercontent.com/assets/8256809/5113653/67db7d6a-7042-11e4-80f5-ccaeaa75ba2f.png) ![h2](https://cloud.githubusercontent.com/assets/8256809/5113654/69e9c7f6-7042-11e4-9a4e-a6c0b55a7fc1.png)