NAME:
    itoolimage__define
 PURPOSE: (one line)
    Define the 'itoolimage' object class.
 DESCRIPTION:

 CATEGORY:
    Widgets
 CALLING SEQUENCE:
    result = obj_new('itoolimage', image)
 INPUTS:
    image : A 2-D or 3-D image array, for use with the itool GUI.
 OPTIONAL INPUT PARAMETERS:

 KEYWORD PARAMETERS:

 OUTPUTS:

 COMMON BLOCKS:

 SIDE EFFECTS:

 RESTRICTIONS:

 PROCEDURE:

 MODIFICATION HISTORY:
    2006/03/15 - Written by Doug Loucks. Renders the itool_init procedure
              as obsolete. With this object class, all image data,
              image-data initializations, and image-data cleanup are
              combined and easily managed, using standard IDL object
              techniques.