Adding notes.

README.md

@@ -1,5 +1,6 @@
-express-stack
-=============
-A proof of concept stack for development using Yeoman 0.9.6, Express and AngularJS
+Yeoman Express Stack
+======================
+A proof of concept stack for development using Yeoman 0.9.6, Express and AngularJS. To get Express Stack, please see the [express-stack](https://github.com/yeoman/yeoman/tree/express-stack) branch.
+
+Please note that this repo is just a placeholder for tracking issues related to Express Stack and pull requests for the project should be made against the express-stack branch.
 
-Please post issues about express-stack here rather than on the main Yeoman issue tracker.