Added the structure of the training step

CMakeLists.txt

MLP/CMakeLists.txt

MLP/include/MLP.hpp

MLP/src/MLP.cpp

tape_machine/CMakeLists.txt

tape_machine/include/Action.hpp

tape_machine/include/ActionSet.hpp

tape_machine/include/Classifier.hpp

tape_machine/include/Config.hpp

tape_machine/include/Oracle.hpp

tape_machine/include/TapeMachine.hpp

tape_machine/src/ActionSet.cpp

tape_machine/src/Classifier.cpp

tape_machine/src/Config.cpp

tape_machine/src/Oracle.cpp

tape_machine/src/TapeMachine.cpp

tests/CMakeLists.txt

tests/src/test_train.cpp

trainer/CMakeLists.txt

trainer/include/Trainer.hpp