ENH: Only one library is compiled + only one header is required

include/4neuro.h

src/CMakeLists.txt

src/NetConnection/ConnectionWeight.cpp

src/NetConnection/ConnectionWeight.h

src/Network/NeuralNetwork.cpp

src/Network/NeuralNetwork.h

src/net_test_1.cpp

src/net_test_2.cpp

src/neuron_serialization_example.cpp