Demo for query storing

Change-Id: I947bcac841992c3f6cfd01ab337c265b0d01cb70
diff --git a/node_modules/readable-stream/duplex.js b/node_modules/readable-stream/duplex.js
new file mode 100644
index 0000000..46924cb
--- /dev/null
+++ b/node_modules/readable-stream/duplex.js
@@ -0,0 +1 @@
+module.exports = require('./readable').Duplex