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

function r = rowVector(v)
    if  size(v,1) == 1
        r = v
    elseif size(v,2) == 1
        r = v';
    else
        error('v is not a matrix');
    end
end