Releasing 2.6.0

Change-Id: Id2e71ca48f4ed853b99c7631c97119239749d349
diff --git a/VERSION b/VERSION
index 8f87ff7..e70b452 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.6.0-dev
+2.6.0