2001-12-10  Sven Neumann  <sven@gimp.org>

	* libgimpbase/Makefile.am
	* libgimpbase/gimpenv.[ch]: added new function gimp_plug_in_directory()
	to retrieve the compile_time defined plug_in directory. Declared some
	functions G_GNUC_CONST and simplified code by introducing a helper
	function.

	* app/config/Makefile.am
	* app/config/gimpcoreconfig.[ch]: started to implement GimpCoreConfig
	derived from GimpBaseConfig.

	* app/config/gimpbaseconfig.[ch]: misc small changes.

	* app/config/gimpconfig-deserialize.c
	(gimp_config_deserialize_properties): return quietly if there are no
	properties.

	* app/config/gimpconfig-substitute.c: more special cases.

	* app/config/test-config.c: test GimpCoreConfig.