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

sky/examples/rendering/borders.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' as math;
 import 'dart:sky' as sky;
 import 'package:sky/framework/app.dart';
 import 'package:sky/framework/rendering/box.dart';
 import 'package:sky/framework/rendering/block.dart';
 import 'package:sky/framework/rendering/node.dart';
@@ skipping 61 matching lines @@
         child: new RenderDecoratedBox(
           decoration: new BoxDecoration(
             backgroundColor: new sky.Color(0xFFFFFF00)
           )
         )
       )
     ),
   ]);
   app = new AppView(root);
 }