Starting 6.1.0-dev version

Change-Id: Ia968880a50b6db8cc722fb33b76d9aeea2636aab
diff --git a/VERSION b/VERSION
index 09b254e..4b740cb 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.0.0
+6.1.0-dev