* tools/shooter.c: cleanup
* tools/widgets.c: cleanup and added two new widgets: frame and path
  editor.

* libgimpwidgets/images/gimp-chain-button.png
* libgimpwidgets/images/gimp-color-button.png
* libgimpwidgets/images/gimp-color-hex-entry.png
* libgimpwidgets/images/gimp-color-scale.png
* libgimpwidgets/images/gimp-color-selection.png: updated.

* libgimpwidgets/images/gimp-frame.png
* libgimpwidgets/images/gimp-path-editor.png: new shots.