Merge branch 'JK/transposition' into 'develop'

src/TNL/Algorithms/AtomicOperations.h

src/TNL/Atomic.h

src/TNL/Matrices/Sandbox/SparseSandboxMatrix.h

src/TNL/Matrices/Sandbox/SparseSandboxMatrix.hpp

src/TNL/Matrices/Sandbox/SparseSandboxMatrixView.h

src/TNL/Matrices/Sandbox/SparseSandboxMatrixView.hpp

src/TNL/Matrices/SparseMatrix.h

src/TNL/Matrices/SparseMatrix.hpp

src/TNL/Matrices/SparseMatrixView.hpp

src/TNL/Solvers/Linear/Hypre.h

src/TNL/Solvers/Linear/Hypre.hpp

src/UnitTests/Algorithms/distributedScanTest.h

src/UnitTests/Algorithms/scanTest.h

src/UnitTests/Matrices/SparseMatrixTest.h

src/UnitTests/Matrices/SparseMatrixTest.hpp