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

% Plot a shape using n points. Returns cell array of plot handles.
%   hs = plot_shape(s,n)
function hs = plot_shape(s,n)
    default_arg('n',100);

    hs = {};
    hold on
    for i = 1:length(s)
        hs{end+1} = parametrization.plot_curve(s{i},n);
    end
    hold off
end