move tip to utils so it can be picked up in the SDK

utils/tip/toss.dart

 // Copyright (c) 2011, 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.
 
-#import('../lib/node/node.dart');
-#import('../file_system_node.dart');
-#import('../lang.dart');
+#import('../../frog/lib/node/node.dart');
+#import('../../frog/file_system_node.dart');
+#import('../../frog/lang.dart');
 
 String compileDart(String basename, String filename) {
   final basedir = path.dirname(basename);
   final fullname = '$basedir/$filename';
 
   world.reset();
   options.dartScript = fullname;
   if (world.compile()) {
     return world.getGeneratedCode();
   } else {
@@ skipping 82 matching lines @@
         res.end(dirToHtml(req.url, filename));
       }
     }
 
 
     res.statusCode = 404;
     res.end('');
   }).listen(1337, "localhost");
   print('Server running at http://localhost:1337/');
 }