add README about config directory being overwritten
diff --git a/xos/xos_configuration/README b/xos/xos_configuration/README
new file mode 100644
index 0000000..9ec0124
--- /dev/null
+++ b/xos/xos_configuration/README
@@ -0,0 +1 @@
+This directory may be overwritten by the XOS configuration system