scatter and Polygon

Thanks, that solved that problem, but if I use

    > 'label="blabla"' in scatter, it does not show up in the
    > legend. Only the label of the Polygon is shown.

There was a bug in the axes autolegend code that was preventing
scatter from being picked up but I have fixed it in svn. Note that
automatically making a legend entry with scatter is a bit problematic,
since scatter can use many different colors. We have a poor-man's
compromise, which is to make a rectangle the sample color as the first
scatter point plotted.