Addes Razer Onza Tournament, Thrustmaster Firestorm Dual Power

Added Razer Onza Tournament (OS X, Linux)
Added Thrustmaster Firestorm Dual Power (Windows, OS X, Linux)

Razer Onza Tournament is an Xbox 360 compatible controller (windows detects xinput compatible controller).
Thrustmaster Firestorm Dual Power is an older controller, has two buttons for the middle fingers (used select/start for them) and instead of left/right triggers left/right buttons below the shoulder buttons.
SDL_GamepadBind strings from steam big picture mode. Added platform manually.

Pictures attached, showing Razer Onza Tournament and Thrustmaster Firestorm Dual Power for comparison with Xbox 360 controller:

![controllers](https://cloud.githubusercontent.com/assets/8013933/3609939/8824966e-0d83-11e4-80e5-8e32716b627a.jpg)

![controllers2](https://cloud.githubusercontent.com/assets/8013933/3609938/8823952a-0d83-11e4-8b9d-301186f23206.jpg)

![controllers3](https://cloud.githubusercontent.com/assets/8013933/3609937/88204280-0d83-11e4-8d85-0930d771ae8b.jpg)