Fix z value method.
Improve 2D histogram converter and remove old code.
Make histogram accessible through getter.  Make ctor public.
Add setting for max value to the renderer to avoid direct dependence on ZBounds interface.
Corrections to listener so 2D histograms are updated right.
Add a Dataset adapter for 2D Clouds.
Update 2D cloud converter to use adapter instead of copying dataset.
Fix 2D cloud listener so it reconfigures the axes if necessary.
Add configuration of axes.
Add axes configuration.  Use more natural string keys for color map names.  I guess these no longer match the ones from AIDA.
Format comment.
Correct to style to turn off color map when not active.  Format comments.
Correction to the conversion of item numbers to histogram bins.
Just remove useless comment.
Reconfigure the axis whenever the plot is redrawn in case the range increased.
Hardcode zero as the lower bound for color maps for now.  Using the actual minimum value is problemmatic for a few reasons and needs to be handled carefully.
Add FIXME note.
Better class doc.  Minor cleanup.
Add function listener which is not fully functional yet (yuck yuck).
Make the function converter more like the other converters.  This still needs work.