Updated readme

packages/zefyr/README.md

@@ -1,6 +1,16 @@
-# Zefyr
+# Zefyr [![Build Status](https://travis-ci.com/memspace/zefyr.svg?branch=master)](https://travis-ci.com/memspace/zefyr) [![codecov](https://codecov.io/gh/memspace/zefyr/branch/master/graph/badge.svg)](https://codecov.io/gh/memspace/zefyr)
 
-This package provides a rich text editor for Flutter applications.
+*Soft and gentle rich text editing for Flutter applications.*
 
-> For documentation see https://github.com/memspace/zefyr.
+Zefyr is currently in **early preview**. If you have a feature
+request or found a bug, please file it at the [issue tracker][].
 
+[issue tracker]: https://github.com/memspace/zefyr/issues
+
+> **Important:** Zefyr currently tracks latest development version of
+> Flutter (`master` branch) and may not work with Flutter beta channel
+> if there are breaking changes.
+
+For documentation see [https://github.com/memspace/zefyr](https://github.com/memspace/zefyr).
+
+![zefyr screenshot](https://github.com/memspace/zefyr/raw/master/packages/zefyr/zefyr.png)