turn off app cache, print generation date at bottom

utils/apidoc/apidoc.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * This generates the reference documentation for the core libraries that come
  * with dart. It is built on top of dartdoc, which is a general-purpose library
  * for generating docs from any Dart code. This library extends that to include
  * additional information and styling specific to our standard library.
  *
@@ skipping 16 matching lines @@
 HtmlDiff _diff;
 
 final GET_PREFIX = 'get:';
 
 void main() {
   final args = new Options().arguments;
 
   int mode = doc.MODE_STATIC;
   String outputDir = 'docs';
   String compilerPath;
-  bool generateAppCache = true;
+  bool generateAppCache = false;
 
   // Parse the command-line arguments.
   for (int i = 0; i < args.length; i++) {
     final arg = args[i];
 
     switch (arg) {
       case '--mode=static':
         mode = doc.MODE_STATIC;
         break;
 
       case '--mode=live-nav':
         mode = doc.MODE_LIVE_NAV;
         break;
 
-      case '--generate-app-cache=false':
-        generateAppCache = false;
+      case '--generate-app-cache=true':
+        generateAppCache = true;
         break;
 
       default:
         if (arg.startsWith('--out=')) {
           outputDir = arg.substring('--out='.length);
         } else if (arg.startsWith('--compiler=')) {
           compilerPath = arg.substring('--compiler='.length);
         } else {
           print('Unknown option: $arg');
           return;
@@ skipping 442 matching lines @@
           '''
           <p class="correspond">This corresponds to $domTypesText in the
           ${a("dom.html", "dart:dom")} library.</p>
           ''';
     }
 
     return '';
   }
 
 }