Refactor of test and train dirs

bert_bilstm/train/config.py

pytorch/embeddings/config.py

pytorch/embeddings/create_embeddings.py

pytorch/embeddings/create_multilang_embeddings.py

pytorch/embeddings/embeddings.py

pytorch/embeddings/load_data.py

pytorch/requirements.txt

pytorch/src/calculate_metrics.py

pytorch/src/config.py

pytorch/src/models/dataset.py

pytorch/src/models/model_base.py

pytorch/src/models/model_utils.py

pytorch/src/test_model.py

pytorch/src/train_model.py

pytorch/src/utils.py