Expression templates are working.

src/TNL/Containers/Algorithms/VectorAssignment.h

src/TNL/Containers/Expressions/ExpressionTemplates.h

src/TNL/Containers/Vector.h

src/TNL/Containers/Vector.hpp

src/TNL/Containers/VectorView.h

src/TNL/Containers/VectorView_impl.h

src/UnitTests/Containers/ArrayViewTest.h

src/UnitTests/Containers/CMakeLists.txt

src/UnitTests/Containers/VectorTest-1.cpp

src/UnitTests/Containers/VectorTest-1.cu

src/UnitTests/Containers/VectorTest-1.h

src/UnitTests/Containers/VectorTest-2.cpp

src/UnitTests/Containers/VectorTest-2.cu

src/UnitTests/Containers/VectorTest-2.h

src/UnitTests/Containers/VectorTest-3.cpp

src/UnitTests/Containers/VectorTest-3.cu

src/UnitTests/Containers/VectorTest-3.h

src/UnitTests/Containers/VectorTest-4.cpp

src/UnitTests/Containers/VectorTest-4.cu

src/UnitTests/Containers/VectorTest-4.h