Keyboard/GamePad/Touch support

[AntoineTurmel]

We need to support:

• [ ] Keyboard (QSD, down, left, right, 2 additional keys for rotation) all re-mappable
• [ ] GamePad (down, left, right, 2 additional keys for rotation)
• [ ] Touch (swipe left, swipe right, swipe down, touch left, touch right, touch down, 2 additional swipe/touch for rotation)

[AntoineTurmel]

For touch screen here are some libraries:

• https://github.com/jeromeetienne/virtualjoystick.js
• https://github.com/austinhallock/html5-virtual-game-controller

[AntoineTurmel]

We could also support Wii U Browser :) http://www.nintendo.co.jp/wiiu/hardware/features/internetbrowser/sample.html