fix paths

README.md

 ### Documentation
 
 * [Quick Start](doc/quick-start.md)
-* [Data Format and Document Model](doc/data-and-document.md)
-* [Style attributes](doc/attributes.md)
-* [Heuristic rules](doc/heuristics.md)
+* [Data Format and Document Model](doc/concepts/data-and-document.md)
+* [Style attributes](doc/concepts/attributes.md)
+* [Heuristic rules](doc/concepts/heuristics.md)
 * [Images](doc/images.md)
 * [FAQ](doc/faq.md)
 

SUMMARY.md

 # Summary
 
-## About
-
-## Quick Start
-
 ## Concepts
 
-* [Data Format and Document Model](doc/data-and-document.md)
-* [Attributes](doc/attributes.md)
-* [Heuristic rules](doc/heuristics.md)
-
-## FAQ
+* [Data Format and Document Model](doc/concepts/data-and-document.md)
+* [Attributes](doc/concepts/attributes.md)
+* [Heuristic rules](doc/concepts/heuristics.md)

packages/zefyr/README.md

 
 Official releases of Zefyr can be installed from Dart's Pub package repository.
 
-> Note that versions from Pub track stable channel of Flutter. If you are on master channel
-> check out instructions below in this document.
+> Note that versions from Pub track stable channel of Flutter.
 
 
 To install Zefyr from Pub add `zefyr` package as a dependency to your `pubspec.yaml`:
 
 And run `flutter packages get`.
 
-#### Installing version of Zefyr compatible with master channel of Flutter.
-
-You need to add git dependency to your pubspec.yaml that points to `flutter-master` branch:
-
-```yaml
-dependencies:
-  zefyr:
-    git:
-      url: https://github.com/memspace/zefyr.git
-      ref: flutter-master
-      path: packages/zefyr
-```
-
-And run `flutter packages get`.
-
-Continue to [https://github.com/memspace/zefyr/blob/master/doc/quick_start.md](documentation) to
+Continue to [https://github.com/memspace/zefyr/blob/master/doc/concepts/quick_start.md](documentation) to
 learn more about Zefyr and how to use it in your projects.