Support GPU processing

[niskov]

Couldn't find configuration to run this over GPU (cuda)

[tinohager]

@niskov You can use Alturos.Yolo this project have gpu support for cuda

[ksasao]

Now you can use GPU-acceleration option with SetPreferableTarget(). It support various CPU/GPU such as NVIDIA, AMD and Intel with FP16. You can also use SetPreferableBackend(), it allows to use Intel's Deep Learning Inference Engine (OpenVINO).