Add 960x540 natvie resolution support

This can be found in Ghostbusters and Terraria . Terriraria is now rendering correctly by using the resolution.

It would be good to have AUTO resolution setting based on native one.

![1](https://cloud.githubusercontent.com/assets/3000282/3068773/49deda48-e292-11e3-8543-747aed42812a.jpg)
![2](https://cloud.githubusercontent.com/assets/3000282/3068774/49e061ce-e292-11e3-9d3e-cee42acd5ab7.jpg)
![3](https://cloud.githubusercontent.com/assets/3000282/3068775/49e1499a-e292-11e3-9391-849f6c364098.jpg)
![4](https://cloud.githubusercontent.com/assets/3000282/3068776/49e95496-e292-11e3-8135-6cff9ff99666.jpg)