Added regression

common/include/util.hpp

common/src/util.cpp

decoder/src/Beam.cpp

reading_machine/include/Action.hpp

reading_machine/include/Classifier.hpp

reading_machine/include/Config.hpp

reading_machine/include/Transition.hpp

reading_machine/src/Action.cpp

reading_machine/src/Classifier.cpp

reading_machine/src/Config.cpp

reading_machine/src/Transition.cpp

torch_modules/include/LossFunction.hpp

torch_modules/src/LossFunction.cpp

trainer/include/Trainer.hpp

trainer/src/MacaonTrain.cpp

trainer/src/Trainer.cpp