pnb model updates

sparse_coding_torch/pnb/classifier_model.py

sparse_coding_torch/pnb/train_classifier.py

sparse_coding_torch/pnb/video_loader.py

sparse_coding_torch/ptx/classifier_model.py

sparse_coding_torch/ptx/load_data.py

sparse_coding_torch/ptx/train_classifier.py

sparse_coding_torch/ptx/train_classifier_vae.py

sparse_coding_torch/ptx/train_sparse_model.py

sparse_coding_torch/ptx/train_vae.py

sparse_coding_torch/ptx/video_loader.py

sparse_coding_torch/utils.py

...Pleural_Line_TensorFlow/pnb_prelim_yolo/yolov4-416.tflite