[ENH] added MPI functionality to the library

build_scripts/linux/linux_gcc_build_x64_debug_local.sh

build_scripts/load_salomon_modules.inc

run_test.sh

src/CrossValidator/CrossValidator.cpp

src/DataSet/DataSet.cpp

src/DataSet/DataSet.h

src/ErrorFunction/ErrorFunctions.cpp

src/LearningMethods/GradientDescent.cpp

src/LearningMethods/GradientDescentBB.cpp

src/LearningMethods/GradientDescentSingleItem.cpp

src/LearningMethods/LazyLearning.cpp

src/LearningMethods/LevenbergMarquardt.cpp

src/LearningMethods/NelderMead.cpp

src/LearningMethods/ParticleSwarm.cpp

src/Network/NeuralNetwork.cpp

src/Reader/CSVReader.cpp

src/Reader/Reader.cpp

src/Reader/XYZReader.cpp

src/Reader/XYZReader.h

src/SymmetryFunction/ACSFParametersOptimizer.cpp