Adding unit tests.

src/core/cuda/reduction-operations.h

src/core/vectors/tnlVectorOperations.h

src/implementation/core/cuda/cuda-reduction_impl.cpp

src/implementation/core/cuda/cuda-reduction_impl.cu

src/implementation/core/cuda/cuda-reduction_impl.h

src/implementation/core/vectors/tnlSharedVector_impl.h

...mplementation/core/vectors/tnlVectorOperationsCuda_impl.h

...mplementation/core/vectors/tnlVectorOperationsHost_impl.h

src/implementation/core/vectors/tnlVectorOperations_impl.cpp

src/implementation/core/vectors/tnlVectorOperations_impl.cu

src/implementation/core/vectors/tnlVector_impl.h

tests/unit-tests/CMakeLists.txt

tests/unit-tests/core/CMakeLists.txt

tests/unit-tests/core/tnlObjectTest.cpp

tests/unit-tests/core/tnlStringTest.cpp

tests/unit-tests/core/tnlStringTester.h

tests/unit-tests/core/vectors/tnlVectorOperationsTester.h

tests/unit-tests/core/vectors/tnlVectorTester.h

tests/unit-tests/tnl-unit-tests.h