TMP: Begin implementation of Levenberg-Marquardt method

src/ErrorFunction/ErrorFunctions.cpp

src/ErrorFunction/ErrorFunctions.h

src/LearningMethods/LevenbergMarquardt.cpp

src/LearningMethods/LevenbergMarquardt.h

src/LearningMethods/ParticleSwarm.cpp

src/Network/NeuralNetwork.cpp

src/examples/simulator.cpp