* Makefile.am: add libgimpconfig to subdirs

	* libgimpconfig/libgimpconfig-docs.sgml
	* libgimpconfig/libgimpconfig-sections.txt
	* libgimpconfig/tmpl/gimpconfig-deserialize.sgml
	* libgimpconfig/tmpl/gimpconfig-error.sgml
	* libgimpconfig/tmpl/gimpconfig-iface.sgml
	* libgimpconfig/tmpl/gimpconfig-params.sgml
	* libgimpconfig/tmpl/gimpconfig-path.sgml
	* libgimpconfig/tmpl/gimpconfig-serialize.sgml
	* libgimpconfig/tmpl/gimpconfig-utils.sgml
	* libgimpconfig/tmpl/gimpconfigtypes.sgml
	* libgimpconfig/tmpl/gimpconfigwriter.sgml
	* libgimpconfig/tmpl/gimpscanner.sgml
	* libgimpconfig/tmpl/libgimpconfig-unused.sgml: added or
	corrected