Add support for artificial viscosity to the 1d burgers scheme. - Add support for artificial viscosity by parametrizing the discretization operator and boundary closure on the viscosity. - Add a time stepper which evaluates and updates the residual viscosity of the solution.

function saveFigurePosition()
    defaultPosition = get(0,'defaultfigureposition');
    f = gcf;
    defaultPosition(1:2) = f.Position(1:2);
    set(0,'defaultfigureposition',defaultPosition);
end