2002-12-05  Michael Natterer  <mitch@gimp.org>

	Cleaned up the exit process:

	* app/core/gimp.[ch]: added an "exit" signal which carries a
	"gboolean kill_it" parameter and has a boolean return value.
	Added gimp_boolean_handled_accumulator() so the emission of "exit"
	can be stopped by returning TRUE from a callback.  Removed
	gimp_shutdown() from the public API and made it "exit"'s default
	implementation. Addec gimp_exit() to emit the signal.

	* app/core/gimpmarshal.list: added BOOLEAN__BOOLEAN marshaller.

	* app/gui/gui.[ch]: Replaced public functions gui_shutdown() and
	gui_exit() by "exit" callbacks. g_signal_connect_after() the
	latter so the shutdown order is correct.

	* app/app_procs.[ch]: removed app_exit() and connect to "exit".
	Split the exit stuff into normal and connect_after callbacks as
	above.

	* app/batch.c
	* app/gui/file-commands.c
	* tools/pdbgen/pdb/misc.pdb
	* app/widgets/gimptoolbox.c: call gimp_exit() instead of
	app_exit(). Don't #include "app_procs.h".

	* app/pdb/misc_cmds.c: regenerated.