chore: Link to the newer Cloud NDB repo in the README

This should make it easier to find the new code and reduce the potential for confusion.

README.md

@@ -5,16 +5,19 @@
 
 ## Introduction
 
+This repository is for the original Datastore ndb client library.
+If you are looking for Cloud NDB, which supports Python 3 and works both inside and outside of the Google App Engine environment, please see [this repository][0].
+
 ---
 **Note:** As of Google App Engine SDK 1.6.4, ndb has reached status General Availability.  
 
 Using ndb from outside of Google App Engine (without the use of Remote API) is currently a work in progress and has not been released.
 
 ---
 
-ndb is a client library for use with [Google Cloud Datastore][0].
+ndb is a client library for use with [Google Cloud Datastore][1].
 It was designed specifically to be used from within the 
-[Google App Engine][1] Python runtime.
+[Google App Engine][2] Python runtime.
 
 ndb is included in the Python runtime and is available through a
 standard Python import.
@@ -28,9 +31,10 @@ however that ndb depends on the non-public Google Datastore App Engine RPC API.
 ## Overview
 
 Learn how to use the ndb library by visiting the Google Cloud Platform 
-[documentation][2].
+[documentation][3].
 
 
-[0]:https://cloud.google.com/datastore
-[1]:https://cloud.google.com/appengine
-[2]:https://cloud.google.com/appengine/docs/python/ndb/
+[0]:https://github.com/googleapis/python-ndb
+[1]:https://cloud.google.com/datastore
+[2]:https://cloud.google.com/appengine
+[3]:https://cloud.google.com/appengine/docs/python/ndb/