Globals initializer

Globals_init

- (id)init {
  self = [super init];
  if (self) {
    valuesSerialQueue = dispatch_queue_create("de.abstracture.valuesSerialQueue", NULL);
    self.values = [NSMutableDictionary dictionary];

    [[NSArray arrayWithObjects:
      @"A", @"B", @"C", @"D", @"E", @"F", nil]
     enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
       dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
         NSString *value = [self slowInitForKey:obj];
         dispatch_async(valuesSerialQueue, ^{
           [self.values setObject:value forKey:obj];
         });
       });
     }];
  }
  return self;
}