Update utils to new library syntax.

utils/apidoc/mdn/postProcess.dart

 /**
  * Read database.json,
  * write database.filtered.json (with "best" entries)
  * and obsolete.json (with entries marked obsolete).
  */
 
-#library("postProcess");
+library postProcess;
 
-#import("dart:io");
-#import("dart:json");
-#import("util.dart");
+import 'dart:io';
+import 'dart:json';
+import 'util.dart';
 
 void main() {
   // Database of code documentation.
   Map<String, List> database = JSON.parse(
       new File('output/database.json').readAsTextSync());
   final filteredDb = {};
   final obsolete = [];
   for (String type in database.keys) {
     final entry = pickBestEntry(database[type], type);
     if (entry == null) {
       print("Can't find ${type} in database.  Skipping.");
       continue;
     }
     filteredDb[type] = entry;
     if (entry.containsKey("members")) {
       Map members = getMembersMap(entry);
       for (String name in members.keys) {
         Map memberData = members[name];
         if (memberData['obsolete'] == true) {
           obsolete.add({'type': type, 'member' : name});
         }
       }
     }
   }
   writeFileSync("output/database.filtered.json", JSON.stringify(filteredDb));
   writeFileSync("output/obsolete.json", JSON.stringify(obsolete));
 }