Reorganize dartdoc to new package layout.

pkg/dartdoc/lib/classify.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.
 
 #library('classify');
 
-#import('../../lib/compiler/implementation/scanner/scannerlib.dart');
+#import('../../../lib/compiler/implementation/scanner/scannerlib.dart');
+// TODO(rnystrom): Use "package:" URL (#4968).
 #import('markdown.dart', prefix: 'md');
 
 /**
  * Kinds of tokens that we care to highlight differently. The values of the
  * fields here will be used as CSS class names for the generated spans.
  */
 class Classification {
   static const NONE = null;
   static const ERROR = "e";
   static const COMMENT = "c";
@@ skipping 177 matching lines @@
       }
       return Classification.KEYWORD;
 
     case EOF_TOKEN:
       return Classification.NONE;
 
     default:
       return Classification.NONE;
   }
 }