Allow for the residual normalization function to return a vector. Also change the default normalization from normalizing on norm(u-mean(u),inf) to norm(u/2), since this proved to be better for 1d burgers

function s = stuffStruct(varargin)
    s = struct();

    for i = 1:nargin
        assert(~isempty(inputname(i)), 'All inputs must be variables.');
        s.(inputname(i)) = varargin{i};
    end
end