Added 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 a 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's 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)