Version history

  6/25/99	Version 0.1 (formerly identified as 0.1a) released

  6/29/99	Added Save Messages and Clear Messages to File menu.
		Interpret unspecified v parameter on vt statement as 0.0.
		Interpret unspecified group name as "default".
  7/02/99	Added support for vt (textures) and vn (normals) statements.
  7/04/99	Added Options tab to Preferences dialog.
  7/05/99	Added ofPathMustExist property to both Save dialogs.
                Corrected performance degradation problem by using map, instead of set,
                for manipulating (v,vt,vn) data prior to output.
		Added threads for reading OBJ file and writing 3DM file.
  7/06/99	Added modal dialog, active when reading OBJ file or writing 3DM file,
		which contains abort button and progress bar.
  7/30/99	Allow use of textures and normals to vary across facets. However, the 3DM
		format requires consistency within a mesh (group); i.e., a 3DM mesh
		can only have textures (or normals) if all faces with the mesh have
		textures (or normals).
  8/18/99	Convert facets with more than four sides to NURBS polygons (option).
  8/26/99	Added toolbar buttons for Convert, Preferences and Help.
  1/07/00	Added support for usemtl (material) statements.
  1/14/00	Updated help file, and split help file up into topics.
  4/17/00	Added Files tab to Preferences dialog, with control for selecting Rhino Colors.txt file.
  4/29/00	Use two windows for help file (table of contents and topic).
  5/05/00	Changed default Warnings settings in Preferences dialog.

  5/06/00	Version 1.0 released.

  5/28/00	Revised note on Preferences dialog about added vertices to include "Use Materials".
                Rearranged Preferences dialog slightly to reduce its height.
          	Read palette file in Preferences dialog OnShow event, rather than on startup.
  5/29/00	If Select Color dialog list box contains no items, display info msg in its
          	OnActivate event.
         	Added note to help file regarding added vertices if "Use Materials" is selected.
                Made various minor revisions to help file.

  5/30/00	Version 1.0.1 released.

  6/14/00	If UseMaterials was not selected, layer name and color for "Default layer" and "Layer for
		converted facets" in Preferences dialog were not being used.
  6/16/00	Corrected various minor memory/resource leaks.  None of these appeared to be
		significant, but these corrections evidently resolve a failure to open a .3dm file
		created with this application in Rhino 2.0 Beta version 8/18/00.

  8/20/00	Version 1.0.2 released.