Separate out the raw (directly manipulating sky.view) examples from the rendering (using RenderObje…

sky/examples/raw/shadowed_box.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:sky';
-import 'package:sky/framework/app.dart';
-import 'package:sky/framework/rendering/box.dart';
-import 'package:sky/framework/rendering/flex.dart';
-import 'package:sky/framework/theme2/colors.dart';
-import 'package:sky/framework/theme2/shadows.dart';
-
-AppView app;
-
-void main() {
-  var coloredBox = new RenderDecoratedBox(
-    decoration: new BoxDecoration(
-      gradient: new RadialGradient(
-        center: Point.origin, radius: 500.0,
-        colors: [Yellow[500], Blue[500]]),
-      boxShadow: Shadow[3])
-  );
-  var paddedBox = new RenderPadding(
-    padding: const EdgeDims.all(50.0),
-    child: coloredBox);
-  app = new AppView(new RenderDecoratedBox(
-    decoration: const BoxDecoration(
-      backgroundColor: const Color(0xFFFFFFFF)
-    ),
-    child: paddedBox
-  ));
-}