first push with refactoring

generate_yolo_regions.py

sparse_coding_torch/onsd/classifier_model.py

sparse_coding_torch/onsd/load_data.py

sparse_coding_torch/onsd/train_classifier.py

sparse_coding_torch/onsd/train_sparse_model.py

sparse_coding_torch/onsd/video_loader.py

sparse_coding_torch/pnb/classifier_model.py

sparse_coding_torch/pnb/generate_tflite.py

sparse_coding_torch/pnb/load_data.py

sparse_coding_torch/pnb/train_classifier.py

sparse_coding_torch/pnb/train_classifier_needle.py

sparse_coding_torch/pnb/train_sparse_model.py

sparse_coding_torch/pnb/video_loader.py

sparse_coding_torch/ptx/classifier_model.py

sparse_coding_torch/ptx/convert_pytorch_to_keras.py

sparse_coding_torch/ptx/generate_tflite.py

sparse_coding_torch/ptx/load_data.py

sparse_coding_torch/ptx/train_classifier.py

sparse_coding_torch/ptx/train_sparse_model.py

sparse_coding_torch/ptx/video_loader.py