Added my attributions to the header files

src/TNL/Containers/Algorithms/CudaMultireductionKernel.h

src/TNL/Containers/Algorithms/Multireduction.h

src/TNL/Containers/Algorithms/Multireduction_impl.h

src/TNL/CudaStreamPool.h

src/TNL/DevicePointer.h

src/TNL/Matrices/MatrixOperations.h

src/TNL/SharedPointer.h

src/TNL/Solvers/Linear/CWYGMRES.h

src/TNL/Solvers/Linear/CWYGMRES_impl.h

src/TNL/Solvers/Linear/GMRES_impl.h

src/TNL/Solvers/Linear/Preconditioners/Diagonal.h

src/TNL/Solvers/Linear/Preconditioners/Diagonal_impl.h

src/TNL/Solvers/Linear/UmfpackWrapper.h

src/TNL/Solvers/Linear/UmfpackWrapper_impl.h

src/TNL/UniquePointer.h

tests/benchmarks/array-operations.h

tests/benchmarks/benchmarks.h

tests/benchmarks/spmv.h

tests/benchmarks/tnl-benchmark-blas.h

tests/benchmarks/vector-operations.h