Color Palette Revision: adds memory of Scheme and CpdFile selection.  Includes defaults and standard scheme comboBoxes.  The scheme maintains its comboBox selection until altered by a change in the min, max, log, or cdp file parameters.  Cpd filename displays as "* (altered)" if the user alters the sliders or any of the colors/values.  Dimap parameters are set accordingly to track and save cpdFileName and schemeName.  In order to actually know if the min or max are changed the variables are now being tracked and then compared with the textfield value.  Only when the value actually changes does the color palette get rebuilt.  By using the texfield's getValue instead of getText for the comparison, this enables the document listener to behave as desired and more like a lose focus behavior.  This is because the getValue only changes with lose of focus.  Found a problem where something was getting messed up in the colorPaletteDefinition if the cpd file contained a max value which was negative.  The color_chooser was getting messed up by this with the bathymetry file.  A quick fix was to add the non-negative max value of 0 to the bathymetry_etop01.cpd file.