2001-08-11  Michael Natterer  <mitch@gimp.org>

	* configure.in: fsck^^^ -- lovely autofoo wants "changequote([,])dnl"

	* app/core/gimpcontext.[ch]: lots of GObject porting.

	* app/core/gimpobject.[ch]: added a "disconnect" signal, which
	like gtk's "destroy" is emitted in dispose(). This is ugly but
	I don't see another "clean" way to implement weak containers.

	* app/core/gimpcontainer.c: connect to the "disconnect" signal of
	the children of weak containes.

	* app/core/gimpimage.[ch]: replaced the "destroy" implementation
	with "dispose" + "finalize". Removed gimage->undo_history.

	* app/devices.c
	* app/gui/dialogs-constructors.c
	* app/gui/tools-commands.c
	* app/tools/tool_manager.c
	* app/widgets/gimpimagedock.c: changed accordingly.