Cropped screenshot and updated example doc

packages/zefyr/example/lib/main.dart

@@ -43,7 +43,11 @@ class MyHomePage extends StatefulWidget {
 }
 
 final doc =
-    r'[{"insert":"Zefyr"},{"insert":"\n","attributes":{"heading":1}},{"insert":"​","attributes":{"embed":{"type":"hr"}}},{"insert":"\n"},{"insert":"Soft and gentle rich text editing for Flutter applications.","attributes":{"i":true}},{"insert":"\nZefyr is an "},{"insert":"early preview","attributes":{"b":true}},{"insert":" open source library.\nDocumentation"},{"insert":"\n","attributes":{"heading":3}},{"insert":"Quick Start"},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Data format and Document Model"},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Style attributes"},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Heuristic rules"},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Clean and modern look"},{"insert":"\n","attributes":{"heading":2}},{"insert":"Zefyr’s rich text editor is built with simplicity and flexibility in mind. It provides clean interface for distraction-free editing. Think Medium.com-like experience.\nimport ‘package:flutter/material.dart’;"},{"insert":"\n","attributes":{"block":"code"}},{"insert":"import ‘package:zefyr/zefyr.dart’;"},{"insert":"\n\n","attributes":{"block":"code"}},{"insert":"void main() {"},{"insert":"\n","attributes":{"block":"code"}},{"insert":" print(“Hello world!”);"},{"insert":"\n","attributes":{"block":"code"}},{"insert":"}"},{"insert":"\n","attributes":{"block":"code"}},{"insert":"\n\n\n"}]';
+    r'[{"insert":"Zefyr"},{"insert":"\n","attributes":{"heading":1}},{"insert":"​","attributes":{"embed":{"type":"hr"}}},{"insert":"\n"},{"insert":"Soft and gentle rich text editing for Flutter applications.","attributes":{"i":true}},{"insert":"\nZefyr is currently in "},{"insert":"early preview","attributes":{"b":true}},{"insert":". If you have a feature request or found a bug, please file it at the "},{"insert":"issue tracker","attributes":{"a":"https://github.com/memspace/zefyr/issues"}},{"insert":'
+    r'".\nDocumentation"},{"insert":"\n","attributes":{"heading":3}},{"insert":"Quick Start","attributes":{"a":"https://github.com/memspace/zefyr/blob/master/doc/quick_start.md"}},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Data Format and Document Model","attributes":{"a":"https://github.com/memspace/zefyr/blob/master/doc/data_and_document.md"}},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Style Attributes","attributes":{"a":"https://github.com/memspace/zefyr/blob/master/doc/attr'
+    r'ibutes.md"}},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Heuristic Rules","attributes":{"a":"https://github.com/memspace/zefyr/blob/master/doc/heuristics.md"}},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"FAQ","attributes":{"a":"https://github.com/memspace/zefyr/blob/master/doc/faq.md"}},{"insert":"\n","attributes":{"block":"ul"}},{"insert":"Clean and modern look"},{"insert":"\n","attributes":{"heading":2}},{"insert":"Zefyr’s rich text editor is built with simplicity and fle'
+    r'xibility in mind. It provides clean interface for distraction-free editing. Think Medium.com-like experience.\nMarkdown inspired semantics"},{"insert":"\n","attributes":{"heading":2}},{"insert":"Ever needed to have a heading line inside of a quote block, like this:\nI’m a Markdown heading"},{"insert":"\n","attributes":{"block":"quote","heading":3}},{"insert":"And I’m a regular paragraph"},{"insert":"\n","attributes":{"block":"quote"}},{"insert":"Code blocks"},{"insert":"\n","attributes":{"headin'
+    r'g":2}},{"insert":"Of course:\nimport ‘package:flutter/material.dart’;"},{"insert":"\n","attributes":{"block":"code"}},{"insert":"import ‘package:zefyr/zefyr.dart’;"},{"insert":"\n\n","attributes":{"block":"code"}},{"insert":"void main() {"},{"insert":"\n","attributes":{"block":"code"}},{"insert":" runApp(MyZefyrApp());"},{"insert":"\n","attributes":{"block":"code"}},{"insert":"}"},{"insert":"\n","attributes":{"block":"code"}},{"insert":"\n\n\n"}]';
 
 Delta getDelta() {
   return Delta.fromJson(json.decode(doc));