Make examples at least compile under glib 1.3.x, and make use of

* Make examples at least compile under glib 1.3.x, and make use
	  of GETTEXT_PACKAGE.
	* Don't install popt* header.
	* Add nn to ALL_LINGUAS.

examples/third.c

@@ -38,8 +38,8 @@ int
 main (int argc, char *argv[])
 {
 	setlocale (LC_ALL, "");
-	bindtextdomain (PACKAGE, GTOPLOCALEDIR);
-	textdomain (PACKAGE);
+	bindtextdomain (GETTEXT_PACKAGE, GTOPLOCALEDIR);
+	textdomain (GETTEXT_PACKAGE);
 
 	gh_enter (argc, argv, main_prog);
 	exit (0);