Begin documenting how to build and release voltctl

Change-Id: Icbfb50fdf69e608281ee0af62b7501240c5d875c
diff --git a/VERSION b/VERSION
index 2f247a4..6d27db5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.10.14
+2.10.15