[ADD] preliminary support for MPI

CMakeLists.txt

build_scripts/linux/linux_gcc_build_x64_release_local.sh

build_scripts/load_salomon_modules.inc

include/4neuro.h

src/CMakeLists.txt

src/Network/NeuralNetwork.cpp

src/Network/NeuralNetwork.h

src/message.h

src/mpi_wrapper.cpp

src/mpi_wrapper.h

src/settings.h