Provide more notes on realtime

real-time-collab/README.md

@@ -1,7 +1,15 @@
 # Roadmap for Real-time Collaboration
 
 Research and data science teams use and share the notebook amongst
-each other in order to complete their work. However, collaborating
-on the same notebook at the same time is a cumbersome process. Our goal
-is to simplify this process and implement real-time collaboration
-backed by GitHub gists.
+each other in order to complete their work. The notebook currently has 
+
+## Real time session for notebooks
+
+At a high level, we want the notebook and other in-memory models managed server side -- users will send and receive updates to the overall notebook session that will be replicated amongst the users.
+
+![real time session](https://cloud.githubusercontent.com/assets/836375/24010956/93cb606c-0a36-11e7-9340-43cfc9355c96.png)
+
+## Precursors
+
+* [x] Build up our base application to have a central event bus (nteract/nteract uses redux)
+* [ ] UI that is a pure reflection of the state of the document (components should not have state unless local)