all: merge master into release-branch.go1.7

Change-Id: I2511c3f7583887b641c9b3694aae54789fbc5342
diff --git a/VERSION b/VERSION
new file mode 100644
index 0000000..240b370
--- /dev/null
+++ b/VERSION
@@ -0,0 +1 @@
+go1.7rc2
\ No newline at end of file