[Footprint] Update readme

ios8/Footprint/README.md

@@ -29,9 +29,12 @@ Target
 ------
 This sample runnable on iPhoneSimulator/iPadSimulator iPhone/iPad
 
+Copyright
+---------
+
+Xamarin port changes are released under the MIT license
+
 Author
 ------ 
-IOS:
-Copyright (C) 2014 Xamarin Inc. All rights reserved.
 
 Ported to Xamarin.iOS by Rustam Zaitov