Create residual viscosity package +rv and generalize the ResidualViscosity class - Generalize residual viscosity, by passing user-defined flux and calculating the time derivative outside of the update. - Create separate RungekuttaRV specifically using interior RV updates - Separate the artifical dissipation operator from the scheme AdvectionRV1D so that the same scheme can be reused for creating the diff op used by the ResidualViscosity class

% setFontSize(fig, pts)
% Sets all fontsizes within a figure to size pts
% The default value for pts is 16.
function setFontSize(fig, pts)
    default_arg('pts', 16);
    set(findall(fig,'-property','FontSize'),'FontSize',pts);
end