Rename AppView to SkyBinding.

sky/examples/rendering/touch_demo.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 import 'dart:math';
 import 'dart:sky';
 
-import 'package:sky/app/view.dart';
 import 'package:sky/rendering/box.dart';
 import 'package:sky/rendering/object.dart';
 import 'package:sky/rendering/paragraph.dart';
+import 'package:sky/rendering/sky_binding.dart';
 import 'package:sky/rendering/stack.dart';
 import 'package:sky/theme2/colors.dart';
 
 // Material design colors. :p
 List<Color> colors = [
   Teal[500],
   Amber[500],
   Purple[500],
   LightBlue[500],
   DeepPurple[500],
@@ skipping 48 matching lines @@
   }
 
   void paint(RenderObjectDisplayList canvas) {
     Paint white = new Paint()..color = const Color(0xFFFFFFFF);
     canvas.drawRect(new Rect.fromSize(size), white);
     for (Dot dot in dots.values)
       dot.paint(canvas);
   }
 }
 
-AppView app;
-
 void main() {
   var paragraph = new RenderParagraph(new InlineText("Touch me!"));
   var stack = new RenderStack(children: [
     new RenderTouchDemo(),
     paragraph,
   ]);
   // Prevent the RenderParagraph from filling the whole screen so
   // that it doesn't eat events.
   paragraph.parentData..top = 40.0
                       ..left = 20.0;
-  app = new AppView(root: stack);
+  new SkyBinding(root: stack);
 }