feat(Flash): Add render methods that do not dump flash autom

query from the front end app for these messages

server/middlewares/express-extensions.js

@@ -0,0 +1,14 @@
+import { Observable } from 'rx';
+
+// add rx methods to express
+export default function() {
+  return function expressExtensions(req, res, next) {
+    // express flash will overwrite render with one that will
+    // dump flash messages to locals on every call to render
+    // Use this when that behavior is not wanted
+    res.renderWithoutFlash = res.render;
+    // render to observable stream using build in render
+    res.render$ = Observable.fromNodeCallback(res.render, res);
+    next();
+  };
+}