Add Git recommendation

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/README b/README
index 8854ad5..cabf9d4 100644
--- a/README
+++ b/README
@@ -225,6 +225,11 @@
 reading parent classes, and finally merges the applications list (append
 unless
 
+Version control
+~~~~~~~~~~~~~~~
+I recommend you maintain your reclass inventory database in Git, right from
+the start.
+
 Usage
 ~~~~~
 For information on how to use reclass directly, invoke reclass.py with --help