added changelog note for crypter class.

changelog.md

@@ -4,4 +4,5 @@
 
 - Moved **system/db/manager.php** to **system/db.php**. Updated alias appropriately.
 - Unspecified optional parameters will be removed from URLs generated using route names.
-- Fixed bug in Config::set that prevented it from digging deep into arrays.
+- Fixed bug in Config::set that prevented it from digging deep into arrays.
+- Replace Crypt class with Crypter class. Ditched static methods for better architecture.