code refactoring

torch_modules/src/DepthLayerTreeEmbedding.cpp

torch_modules/src/FocusedColumnLSTM.cpp

torch_modules/src/LSTM.cpp

torch_modules/src/LSTMNetwork.cpp

torch_modules/src/MLP.cpp

torch_modules/src/NeuralNetwork.cpp

torch_modules/src/RLTNetwork.cpp

torch_modules/src/RandomNetwork.cpp

torch_modules/src/RawInputLSTM.cpp

torch_modules/src/SplitTransLSTM.cpp

torch_modules/src/Submodule.cpp