Refactoring timers and smart pointers.

examples/advection/advectionProblem.h

examples/advection/advectionProblem_impl.h

examples/inviscid-flow/1d/eulerProblem.h

examples/inviscid-flow/1d/eulerProblem_impl.h

examples/inviscid-flow/2d/eulerProblem.h

examples/inviscid-flow/2d/eulerProblem_impl.h

src/TNL/CMakeLists.txt

src/TNL/Devices/Cuda.cpp

src/TNL/Devices/Cuda.h

src/TNL/Functions/MeshFunction.h

src/TNL/Functions/MeshFunction_impl.h

src/TNL/Functions/OperatorFunction.h

src/TNL/Matrices/MatrixSetter.h

src/TNL/Problems/HeatEquationProblem.h

src/TNL/Problems/HeatEquationProblem_impl.h

src/TNL/Problems/PDEProblem.h

src/TNL/SharedPointer.h

src/TNL/SmartPointer.h

src/TNL/SmartPointersRegister.cpp

src/TNL/SmartPointersRegister.h