feat(main-route): develop Start screen UI to match UI mockups

With @Frozenfire92 @rainbee2214

### Mockup

![mockup](https://docs.google.com/drawings/d/1rPUCW1wFPFLXYXWE_3lfX_NWZFbCpm6ZdGtYpbe6E0A/pub?w=960&h=720)

### Screenshot 

![image](https://cloud.githubusercontent.com/assets/1885333/4305958/2f786042-3e7d-11e4-974e-99648b29bc41.png)