Refactor fn2.dart, since it breached our 1000-line threshold.

sky/examples/widgets/container.dart

Index: sky/examples/widgets/container.dart
diff --git a/sky/examples/fn2/container.dart b/sky/examples/widgets/container.dart
similarity index 91%
rename from sky/examples/fn2/container.dart
rename to sky/examples/widgets/container.dart
index f1eec6bbea4558b79b488c8fed36e20411c37a09..437784078ade73ed332a35772e5d65e328441091 100644
--- a/sky/examples/fn2/container.dart
+++ b/sky/examples/widgets/container.dart
@@ -3,8 +3,11 @@
 // found in the LICENSE file.
 
 import 'dart:sky' as sky;
-import 'package:sky/framework/fn2.dart';
+
 import 'package:sky/framework/rendering/box.dart';
+import 'package:sky/framework/widgets/ui_node.dart';
+import 'package:sky/framework/widgets/wrappers.dart';
+
 import '../lib/solid_color_box.dart';
 
 class Rectangle extends RenderObjectWrapper {
@@ -29,7 +32,7 @@ class ContainerApp extends App {
           child: new Block([
             new Container(
               decoration: new BoxDecoration(backgroundColor: const sky.Color(0xFFFFFF00)),
-              height: 20.0,
+              height: 20.0
             ),
             new Image(src: "https://www.dartlang.org/logos/dart-logo.png",
               size: new sky.Size(300.0, 300.0),