Added dimmension reduction in Concat module

reading_machine/src/Classifier.cpp

torch_modules/include/Concat.hpp

torch_modules/src/Concat.cpp

torch_modules/src/ContextModule.cpp

torch_modules/src/ContextualModule.cpp

torch_modules/src/DepthLayerTreeEmbeddingModule.cpp

torch_modules/src/DistanceModule.cpp

torch_modules/src/FocusedColumnModule.cpp

torch_modules/src/HistoryMineModule.cpp

torch_modules/src/HistoryModule.cpp

torch_modules/src/NumericColumnModule.cpp

torch_modules/src/RawInputModule.cpp

torch_modules/src/SplitTransModule.cpp

torch_modules/src/UppercaseRateModule.cpp

trainer/src/MacaonTrain.cpp