* devel-docs/tools/widgets.c: added all but the GimpPixmap widget.
  The unit menu shot is also very buggy.

* devel-docs/libgimpwidgets/images/gimp-color-area.png
* devel-docs/libgimpwidgets/images/gimp-color-button.png
* devel-docs/libgimpwidgets/images/gimp-color-hex-entry.png
* devel-docs/libgimpwidgets/images/gimp-color-scale.png
* devel-docs/libgimpwidgets/images/gimp-color-selection.png
* devel-docs/libgimpwidgets/images/gimp-dialog.png
* devel-docs/libgimpwidgets/images/gimp-enum-combo-box.png
* devel-docs/libgimpwidgets/images/gimp-int-combo-box.png
* devel-docs/libgimpwidgets/images/gimp-memsize-entry.png
* devel-docs/libgimpwidgets/images/gimp-offset-area.png
* devel-docs/libgimpwidgets/images/gimp-path-editor.png
* devel-docs/libgimpwidgets/images/gimp-pick-button.png
* devel-docs/libgimpwidgets/images/gimp-preview-area.png
* devel-docs/libgimpwidgets/images/gimp-unit-menu.png: updated all
  these files.