YOLO-Master v0.1-seg-N edge models

Segmentation model (COCO-80, 640px) exported to ONNX / NCNN / MNN for the C++ runtime + Windows GUI. Unzip into models/ so v0.1-seg-n.onnx, v0.1-seg-n.mnn (+ .metadata.yaml), and v0.1-seg-n_ncnn/ sit directly in models/.