Expose several tree options, to control recursive dir addition.

demo/iso.c

@@ -66,7 +66,10 @@ int main(int argc, char **argv)
         return 1;
     }
     iso_image_set_msgs_severities(image, "NEVER", "ALL", "");
-	
+    iso_tree_set_follow_symlinks(image, 0);
+    iso_tree_set_ignore_hidden(image, 0);
+    iso_tree_set_stop_on_error(image, 0);
+    
     result = iso_tree_add_dir_rec(image, iso_image_get_root(image), argv[1]);
     if (result < 0) {
         printf ("Error adding directory %d\n", result);