release aether-1.6 documentation

Change-Id: Ieb0635b290e95dc6b19aeefa46eac0e3e913d1b2
diff --git a/VERSION b/VERSION
index 88622a6..dc1e644 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.6.0-dev1
+1.6.0