Introduce boot.js: this finally makes it possible to load and run Todomvc

lib/src/html_css_fixup.dart

 // Copyright (c) 2013, 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.
 
 library html_css_fixup;
 
 import 'dart:json' as json;
 
 import 'package:csslib/parser.dart' as css;
 import 'package:csslib/visitor.dart';
@@ skipping 18 matching lines @@
 
   /** Emit CSS selectors scoped to the "is" attribute of the component. */
   static const SCOPED_POLYFILL = const CssPolyfillKind(1);
 
   /** Emit CSS selectors mangled. */
   static const MANGLED_POLYFILL = const CssPolyfillKind(2);
 
   static CssPolyfillKind of(CompilerOptions options, ComponentInfo component) {
     if (!options.processCss || !component.scoped) return NO_POLYFILL;
     if (options.mangleCss) return MANGLED_POLYFILL;
-    if (!component.hasAuthorStyles && !hasCssReset) return MANGLED_POLYFILL;
+    if (!component.hasAuthorStyles && options.resetCssFile == null) {
+      return MANGLED_POLYFILL;
+    }
     return SCOPED_POLYFILL;
   }
 }
 
 
 /**
  *  If processCss is enabled, prefix any component's HTML attributes for id or
  *  class to reference the mangled CSS class name or id.
  */
 void fixupHtmlCss(FileInfo fileInfo, CompilerOptions options) {
@@ skipping 529 matching lines @@
 
         // Find all imports return list of @imports in this style tag.
         var urlInfos = findImportsInStyleSheet(styleSheet, _packageRoot,
             _inputUrl, _messages);
         imports.addAll(urlInfos);
       }
     }
     super.visitElement(node);
   }
 }