Whats new page

lib/pages/whats_new.page.dart

@@ -0,0 +1,69 @@
+part of '../main.dart';
+
+class WhatsNewPage extends StatefulWidget {
+  WhatsNewPage({Key key}) : super(key: key);
+
+  @override
+  _WhatsNewPageState createState() => new _WhatsNewPageState();
+}
+
+class _WhatsNewPageState extends State<WhatsNewPage> {
+
+  String data = "";
+  String error = "";
+
+  @override
+  void initState() {
+    super.initState();
+    _loadData();
+  }
+
+  _loadData() async {
+    setState(() {
+      data = "";
+      error = "";
+    });
+    http.Response response;
+    response = await http.get("http://ha-client.homemade.systems/service/whats_new.md");
+    if (response.statusCode == 200) {
+      setState(() {
+        data = response.body;
+      });
+    } else {
+      setState(() {
+        error = "Can't load changelog";
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    Widget body;
+    if (error.isNotEmpty) {
+      body = PageLoadingError(errorText: error,);
+    } else if (data.isEmpty) {
+      body = PageLoadingIndicator();
+    } else {
+      body = Markdown(
+        data: data,
+      );
+    }
+    return new Scaffold(
+      appBar: new AppBar(
+        leading: IconButton(icon: Icon(Icons.arrow_back), onPressed: (){
+          Navigator.pop(context);
+        }),
+        actions: <Widget>[
+          IconButton(
+            icon: Icon(Icons.refresh),
+            onPressed: () => _loadData(),
+          )
+        ],
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: new Text("What's new"),
+      ),
+      body: body
+    );
+  }
+}