More work on External Resouces

README.md

@@ -131,7 +131,7 @@ change, but sometimes the outside world must also be effected
 
 ### 3rd Domino - Effect Handling
 
-The descriptions of `effects` are realised (actioned). This is where mutations happens.
+The descriptions of `effects` are realised (actioned).
 
 Now, to a functional programmer, `effects` are scary in a 
 [xenomorph kind of way](https://www.google.com.au/search?q=xenomorph).
@@ -143,17 +143,17 @@ never achieving anything.
 So re-frame embraces the protagonist nature of `effects` - the entire, unruly zoo of them - but
 it does so in a largely hidden way, and in a manner which is debuggable, auditable, mockable and pluggable.
 
-### A Pivot Point
+### We're At A Pivot Point
 
 The world just changed and, very often, one particular part of it: the **application state**.
 
 re-frame's `app state` is held in one place - think of it like you 
-would an in-memory, central database for the app (more details later).
+would an in-memory, central database for the app (details later).
 
 When domino 3 changes this `app state`, it triggers the next part of the cascade 
 involving dominoes 4-5-6.
 
-### There's a formula  
+### There's a Formula  
 
 The 4-5-6 domino cascade implements the formula made famous by Facebook's ground-breaking React library:  
   `v = f(s)`

docs/External-Resources.md

@@ -49,13 +49,15 @@ Please add to this list by submitting a pull request.
 * [re-frame-web3-fx](https://github.com/madvas/re-frame-web3-fx) - Ethereum Web3 API
 * [re-frame-google-analytics-fx](https://github.com/madvas/re-frame-google-analytics-fx) - Google Analytics API
 
-### Tools And Techniques
+### Tools, Techniques & Libraries
 
-* Animation using `react-flip-move`: http://www.upgradingdave.com/blog/posts/2016-12-17-permutation.html
+* [re-frame-undo](https://github.com/Day8/re-frame-undo) - An undo library for re-frame
+* Animation using `react-flip-move` - http://www.upgradingdave.com/blog/posts/2016-12-17-permutation.html
 * [re-frisk](https://github.com/flexsurfer/re-frisk) - A library for visualizing re-frame data and events.
 * [re-thread](https://github.com/yetanalytics/re-thread) - A library for running re-frame applications in Web Workers.
 * [re-frame-datatable](https://github.com/kishanov/re-frame-datatable) - DataTable UI component built for use with re-frame. 
 * [Stately: State Machines](https://github.com/nodename/stately) also https://www.youtube.com/watch?v=klqorRUPluw
+* [re-frame-test](https://github.com/Day8/re-frame-test) - Integration Testing (not documented)
 
 ### Videos
 

docs/SubscriptionFlow.md

@@ -1,7 +1,7 @@
 ## Flow Mechanics
 
-This tutorial can be skipped. It provides advanced, background information. 
-It explains Reagent's underlying reactive mechanism used in dominoes 4-5-6.
+If you are in a hurry, this tutorial can be skipped. It provides advanced, background information. 
+It explains the underlying reactive mechanism used in dominoes 4-5-6.
 
 ## On Flow