Implement 3d renderer

![screen-shot-2014-09-09-at-18 55 19](https://cloud.githubusercontent.com/assets/4512048/4205629/836e3e6a-3842-11e4-8f13-225a06a0f4f7.jpg)

Planet radius should depend on the planet growing ratio. To see if the ships are trying to conquer the planets with the bigger growing ratio.