Update project authors statements to Dartino

samples/todomvc/ios/TodoMVC/AddTodoItemViewController.mm

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, the Dartino 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.md file.
 
 #import "AddTodoItemViewController.h"
 
 @interface AddTodoItemViewController ()
 
 @property (weak, nonatomic) IBOutlet UITextField *textField;
 @property (weak, nonatomic) IBOutlet UIBarButtonItem *saveButton;
 
@@ skipping 20 matching lines @@
   if (sender != self.saveButton || self.textField.text.length <= 0) {
     self.todoItem = nil;
     return;
   }
   self.todoItem = [[TodoItem alloc] init];
   self.todoItem.itemName = self.textField.text;
   self.todoItem.completed = NO;
 }
 
 @end