* Added sharpen to stable dist

* updated sgi and despeckle plugins

* plug-ins/xd/xd.c: works with xdelta 0.18. The use of xdelta versions prior
to this is not-supported.

* plug-in/gfig/gfig.c: spelling corrections :)

* app/fileops.c: applied gimp-gord-980420-0, fixes stale save procs in the
file dialog

* app/text_tool.c: applied gimp-egger-980420-0, text tool optimization

-Yosh