Add Cards and Fitness demos, remove sector.

sky/sdk/example/demo_launcher/lib/main.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 'package:sky/mojo/activity.dart' as activity;
 import 'package:sky/mojo/asset_bundle.dart';
 import 'package:sky/painting/box_painter.dart';
 import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/theme/typography.dart' as typography;
 import 'package:sky/widgets/basic.dart';
@@ skipping 72 matching lines @@
     description: '2D game using sprite sheets to achieve high performance',
     textTheme: typography.white,
     decoration: new BoxDecoration(
       backgroundImage: new BackgroundImage(
         image: _bundle.loadImage('assets/game_thumbnail.png'),
         fit: BackgroundFit.cover
       )
     )
   ),
   new SkyDemo(
-    name: 'Interactive Flex',
-    href: '../../rendering/interactive_flex.dart',
-    bundle: 'interactive_flex.skyx',
-    description: 'Swipe to adjust the layout of the app',
+    name: 'Fitness',
+    href: '../../fitness/lib/main.dart',
+    bundle: 'fitness.skyx',
+    description: 'Collin should write a nice description',
     textTheme: typography.white,
     decoration: new BoxDecoration(
       backgroundColor: const Color(0xFF0081C6)
     )
   ),
   new SkyDemo(
-    name: 'Sector',
-    href: '../../widgets/sector.dart',
-    bundle: 'sector.skyx',
-    description: 'Demo of alternative layouts',
-    textTheme: typography.black,
+    name: 'Cards',
+    href: '../../widgets/card_collection.dart',
+    bundle: 'cards.skyx',
+    description: 'Demo of interactive Cards',
+    textTheme: typography.white,
     decoration: new BoxDecoration(
-      backgroundColor: colors.black,
-      backgroundImage: new BackgroundImage(
-        image: _bundle.loadImage('assets/sector_thumbnail.png'),
-        fit: BackgroundFit.cover
-      )
+      backgroundColor: const Color(0xFF0081C6)
+    )
+  ),
+  new SkyDemo(
+    name: 'Interactive Text',
+    href: '../../rendering/interactive_flex.dart',
+    bundle: 'interactive_flex.skyx',
+    description: 'Swipe to reflow the app',
+    textTheme: typography.white,
+    decoration: new BoxDecoration(
+      backgroundColor: const Color(0xFF0081C6)
     )
   ),
   // new SkyDemo(
 
   //   'Touch Demo', '../../rendering/touch_demo.dart', 'Simple example showing handling of touch events at a low level'),
   new SkyDemo(
     name: 'Minedigger Game',
     href: '../../mine_digger/lib/main.dart',
     bundle: 'mine_digger.skyx',
     description: 'Clone of the classic Minesweeper game',
@@ skipping 47 matching lines @@
       itemBuilder: buildDemo,
       padding: kListPadding
     );
   }
 }
 
 class SkyHome extends App {
   Widget build() {
     return new Theme(
       data: new ThemeData(
-        brightness: ThemeBrightness.dark,
+        brightness: ThemeBrightness.light,
         primarySwatch: colors.Teal
       ),
       child: new TaskDescription(
         label: 'Sky Demos',
         child: new Scaffold(
           toolbar: new ToolBar(center: new Text('Sky Demos')),
           body: new Material(
             type: MaterialType.canvas,
             child: new DemoList()
           )
         )
       )
     );
   }
 }
 
 void main() {
   runApp(new SkyHome());
 }