Added CHANGELOG for #13

Author: weierophinney

CHANGELOG.md

@@ -18,6 +18,10 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Fixed
 
+- [#13](https://github.com/zendframework/zend-file/pull/13) fixes the behavior
+  of the `Zend\File\Transfer` component when multiple uploads using the same
+  client name are provided, and no filename filtering is performed; the code now
+  ensures that unique names are used in such situations.
 - [#14](https://github.com/zendframework/zend-file/pull/14) updates the
   `FilterPluginManager` to work with the updated zend-filter 2.6.0 changes,
   fixing an issue where the zend-file filters were replacing (instead of