uEye camera: fixed a few compiler errors.
UEye Camera: added the 'acquisitionCallback' static method.

This method is called back on each acquisition event during live
acquisition.
uEye Camera: Added and implemented the 'getCameraID' method.
uEye Event Thread: Changed the constructor.

The instance constructor now takes a pointer to the parent uEye_Camera
object. Other parameters such as the camera ID are set using uEye_Camera
getter methods.
uEye Event Thread: Modified the signature of the callback function.

The callback function now always takes a pointer to the parent camera
object as argument. This enables the callback function to access camera
related parameters.