Implementing the CUDA support in the dense matrix.

src/core/tnlCuda.h

src/core/tnlHost.h

src/implementation/core/tnlCuda.cpp

src/implementation/core/tnlHost.cpp

src/implementation/matrices/tnlCSRMatrix_impl.h

src/implementation/matrices/tnlChunkedEllpackMatrix_impl.h

src/implementation/matrices/tnlDenseMatrix_impl.h

src/implementation/matrices/tnlEllpackMatrix_impl.h

src/implementation/matrices/tnlMatrix_impl.h

src/implementation/matrices/tnlMultidiagonalMatrix_impl.h

src/implementation/matrices/tnlSlicedEllpackMatrix_impl.h

src/implementation/matrices/tnlTridiagonalMatrix_impl.h

src/matrices/tnlDenseMatrix.h

src/matrices/tnlMatrix.h

tests/unit-tests/matrices/tnlDenseMatrixTester.h