Optimizing parallel reduction in CUDA.

src/core/CMakeLists.txt

src/core/cuda/cuda-prefix-sum_impl.h

src/core/cuda/cuda-reduction_impl.h

src/core/cuda/reduction-operations.h

src/core/mfuncs.h

src/core/tnlConstants.h

src/core/tnlCuda.h

src/core/vectors/tnlVectorOperationsCuda_impl.h

tests/benchmarks/tnl-cuda-benchmarks.h