[linux] Rewrite SDL_Joystick to use SDL2: adds hotplug support, correctly handles multiple joysticks and improves axis handling
[windows] WINJoystick: correctly handle multiple joystick and improve triggers
Update Application.cpp to accomodate for CJoystick signature changes in SDL_Joystick and WINJoystick
Pass keymap extracted by CButtonTranslator to CJoystick