* Start haptic for hot-plugged joysticks/gamepads also.
* Minor improvements here and there.
* Document _zoom action bidnging.
* Corrected Doom3 mapping in example joystick configuration.
Scripts to easily build SDL or SDL2 version in Linux.
s_ControllerMappings is an internal SDL variable no visible to the user so don not use it. Other minor changes here and there.
* Proper SDL 2 joytick support. Features available under SDL2 are:
controller gamepad support, unified joystick remapping, joystick/controller
hotplug and haptics/rumble support.
Fix small compilation error in SDL1.