Rationalize Dart mojo and sky package structure

sky/framework/components/icon_button.dart

Index: sky/framework/components/icon_button.dart
diff --git a/sky/framework/components/icon_button.dart b/sky/framework/components/icon_button.dart
deleted file mode 100644
index 7ed8d39020497fc1a2651b7ed482cfd165d17f45..0000000000000000000000000000000000000000
--- a/sky/framework/components/icon_button.dart
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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 '../fn.dart';
-import 'icon.dart';
-
-class IconButton extends Component {
-  static Style _style = new Style('''
-    padding: 8px;''');
-
-  String icon;
-  GestureEventListener onGestureTap;
-
-  IconButton({ String icon: '', this.onGestureTap })
-    : super(key: icon), icon = icon;
-
-  UINode build() {
-    return new EventListenerNode(
-      new StyleNode(new Icon(type: icon, size: 24), _style),
-      onGestureTap: onGestureTap);
-  }
-}