Sort state management links roughly by complexity (#1668)

Also adds a “General overview” section.

Author: filiph

src/docs/development/data-and-backend/state-mgmt.md

@@ -10,35 +10,50 @@ Until we provide more docs/examples, learn more at the
 following links, some of which have been
 contributed by the Flutter community:
 
+## General overview
+
+* [Build reactive mobile apps with Flutter](https://www.youtube.com/watch?v=RS36gBEp8OI&feature=youtu.be),
+  a video from Google I/O 2018, and an
+  [accompanying article]({{site.flutter-medium}}/build-reactive-mobile-apps-in-flutter-companion-article-13950959e381)
+* [Flutter Architecture Samples](http://fluttersamples.com/), by Brian Egan
+
 ## setState
 
-* [Build reactive mobile apps with Flutter](https://www.youtube.com/watch?v=RS36gBEp8OI&feature=youtu.be), a video from Google I/O 2018 [Accompanying article on Medium]({{site.flutter-medium}}/build-reactive-mobile-apps-in-flutter-companion-article-13950959e381)
-* [Adding interactivity to your Flutter app](/docs/development/ui/interactive), a Flutter tutorial
-* [Basic state management in Google Flutter](https://medium.com/@agungsurya/basic-state-management-in-google-flutter-6ee73608f96d), by Agung Surya
+* [Adding interactivity to your Flutter app](/docs/development/ui/interactive),
+  a Flutter tutorial
+* [Basic state management in Google Flutter](https://medium.com/@agungsurya/basic-state-management-in-google-flutter-6ee73608f96d),
+  by Agung Surya
+
+## InheritedWidget & Scoped model
+
+* [Using Flutter Inherited Widgets Effectively](https://ericwindmill.com/posts/inherited_widget/),
+  by Eric Windmill
+* [You might not need Redux: The Flutter edition](https://proandroiddev.com/you-might-not-need-redux-the-flutter-edition-9c11eba006d7), by Ryan Edge
+* [Managing state with the scoped model pattern in Dart's Flutter framework](https://www.youtube.com/watch?v=-MCeWP3rgI0), a video by Tensorflow Programming
+* [Flutter: Inherited Widget and Scoped Model Explained, part 1](https://www.youtube.com/watch?v=j-27MZwRbFw),
+  a video by MTechViral
+* [Flutter state management—scoped model](https://www.youtube.com/watch?v=Oql5bU-Uvso)
+* [Scoped model package](https://pub.dartlang.org/packages/scoped_model)
 
 ## Redux
 
 * [Animation Management with Redux and Flutter](https://www.youtube.com/watch?v=9ZkLtr0Fbgk), a video from DartConf 2018 [Accompanying article on Medium](https://medium.com/flutter-io/animation-management-with-flutter-and-flux-redux-94729e6585fa)
 * [Flutter Redux package]({{site.pub}}/packages/flutter_redux) on the [Package site]({{site.pub}})
 * [Introduction to Redux in Flutter](https://blog.novoda.com/introduction-to-redux-in-flutter/), by Xavi Rigau
-* [Flutter + Redux—How to make a shopping list app](https://hackernoon.com/flutter-redux-how-to-make-shopping-list-app-1cd315e79b65)
-  by Paulina Szklarska on Hackernoon.
-* [Building a TODO application (CRUD) in Flutter with Redux—Part 1](https://www.youtube.com/watch?v=Wj216eSBBWs), a video by Tensorflow Programming.
-* [Flutter Redux Thunk, an example](https://medium.com/flutterpub/flutter-redux-thunk-27c2f2b80a3b) by Jack Wong
-* [Building a (large) Flutter app with Redux](https://hillelcoren.com/2018/06/01/building-a-large-flutter-app-with-redux/) by Hillel Coren
+* [Flutter + Redux—How to make a shopping list app](https://hackernoon.com/flutter-redux-how-to-make-shopping-list-app-1cd315e79b65),
+  by Paulina Szklarska on Hackernoon
+* [Building a TODO application (CRUD) in Flutter with Redux—Part 1](https://www.youtube.com/watch?v=Wj216eSBBWs),
+  a video by Tensorflow Programming.
+* [Flutter Redux Thunk, an example](https://medium.com/flutterpub/flutter-redux-thunk-27c2f2b80a3b),
+  by Jack Wong
+* [Building a (large) Flutter app with Redux](https://hillelcoren.com/2018/06/01/building-a-large-flutter-app-with-redux/),
+  by Hillel Coren
 
-## BLoC
+## BLoC / Rx
 
 * [State Management Using BLoC pattern in Flutter](https://hk.saowen.com/a/fbb6e484de022173fe85248875286060ce40d069c97420bc0be49d838e19e372), 
   by Saowen
-* [Architect your Flutter project using BLOC pattern](https://medium.com/flutterpub/architecting-your-flutter-project-bd04e144a8f1) by Sagar Suri
-* [Example using BLoC pattern for state management](https://www.reddit.com/r/FlutterDev/comments/9b025j/example_using_bloc_pattern_for_state_management/) by CodyLeet on reddit
-
-## Scoped model
-
-* [You might not need Redux: The Flutter edition](https://proandroiddev.com/you-might-not-need-redux-the-flutter-edition-9c11eba006d7), by Ryan Edge
-* [Managing state with the scoped model pattern in Dart's Flutter framework](https://www.youtube.com/watch?v=-MCeWP3rgI0), a video by Tensorflow Programming
-* [Flutter: Inherited Widget and Scoped Model Explained, part 1](https://www.youtube.com/watch?v=j-27MZwRbFw),
-  a video by MTechViral
-* [Flutter state management—scoped model](https://www.youtube.com/watch?v=Oql5bU-Uvso)
-* [Scoped model package](https://pub.dartlang.org/packages/scoped_model)
+* [Architect your Flutter project using BLOC pattern](https://medium.com/flutterpub/architecting-your-flutter-project-bd04e144a8f1),
+  by Sagar Suri
+* [Example using BLoC pattern for state management](https://www.reddit.com/r/FlutterDev/comments/9b025j/example_using_bloc_pattern_for_state_management/),
+  by CodyLeet on reddit