ENH: Classes rewritten using new exception macros.

src/CSVReader/CSVReader.cpp

src/DataSet/DataSet.cpp

src/General/ExprtkWrapper.cpp

src/LearningMethods/ParticleSwarm.cpp

src/NetConnection/ConnectionFunctionGeneral.cpp

src/Network/NeuralNetwork.cpp

src/NormalizationStrategy/NormalizationStrategy.cpp

src/Solvers/DESolver.cpp