Converted Observatory script-inset & source-inset elements

runtime/observatory/lib/src/models/objects/script.dart

 // Copyright (c) 2016, 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.
 
 part of models;
 
 abstract class ScriptRef extends ObjectRef {
   /// The uri from which this script was loaded.
   String get uri;
 }
 
 abstract class Script extends Object implements ScriptRef {
   /// The library which owns this script.
-  // LibraryRef get library;
+  LibraryRef get library;
 
   /// The source code for this script. For certain built-in scripts,
   /// this may be reconstructed without source comments.
   String get source;
 
+  DateTime get loadTime;
+  int get firstTokenPos;
+  int get lastTokenPos;
+  int get lineOffset;
+  int get columnOffset;
+
   int tokenToLine(int token);
   int tokenToCol(int token);
 }