Clean up examples directory

1) Merge input example into widgets example
2) Move single-file, non-fn examples into a "raw" directory
3) Rename stocks-fn and widgets-fn to stocks and widgets

R=ojan@chromium.org

Review URL: https://codereview.chromium.org/1005393006

examples/home.sky

 #!mojo mojo:sky_viewer
-<div><!-- remove this element once Document can have multiple element children -->
 <style>
  .h1 { font-size: 2em; margin: 1em; }
  .p { margin: 0.5em 1em; color: #bcd8f5; font-weight: 900; }
 </style>
 <div class="h1">about:blank</div>
 <div class="p">Welcome to Sky!</div>
-</div>

examples/input/index.sky

-#!mojo mojo:sky_viewer
-<sky>
-<import src="/sky/framework/debug/shake-to-reload.sky" />
-<script>
-import 'input_app.dart';
-main() {
-  new InputApp();
-}
-</script>
-</sky>

examples/input/input_app.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/framework/fn.dart';
-import 'package:sky/framework/components/input.dart';
-
-class InputApp extends App {
-  Node build() {
-    return new Input();
-  }
-}

examples/touch-demo.sky → examples/raw/touch-demo.sky

@@ -10,8 +10,12 @@ dot {
     border-radius: 5px;
     opacity: .75;
 }
+
+log {
+    margin-top: 50px;
+}
 </style>
-<log>Ready!</log>
+<log>Touch the screen!</log>
 <script>
 import "dart:sky";
 

examples/widgets-fn/widgets_app.dart → examples/widgets/widgets_app.dart

@@ -4,6 +4,7 @@
 
 import 'package:sky/framework/fn.dart';
 import 'package:sky/framework/components/button.dart';
+import 'package:sky/framework/components/input.dart';
 import 'package:sky/framework/components/popup_menu.dart';
 
 class WidgetsApp extends App {
@@ -17,6 +18,7 @@ class WidgetsApp extends App {
       children: [
         new Button(key: 'Go', content: new Text('Go'), level: 1),
         new Button(key: 'Back', content: new Text('Back'), level: 3),
+        new Input(),
         new Container(
           style: _menuStyle,
           children: [