Fixing high-dimansion neighborhood

src/Grid/grid_key.hpp

src/Grid/grid_sm.hpp

src/Makefile.am

src/NN/CellList/CellList.hpp

src/NN/CellList/CellListIterator_test.hpp

src/NN/CellList/CellNNIterator.hpp

src/NN/CellList/CellNNIteratorM.hpp

src/NN/CellList/NNc_array.hpp

src/NN/CellList/ParticleItCRS_Cells.hpp

src/NN/CellList/tests/NNc_array_tests.hpp

src/Space/Shape/Point.hpp

src/main.cpp