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

classdef Structured < grid.Grid
    methods (Abstract)
        % Returns the size of the grid in each dimension m = [mx my mz ...]
        m = size(obj); % Is this a good idea? Isn't immersed a structured grid?
        h = scaling(obj);
    end
end