Created CHANGELOG for #13

Author: weierophinney

CHANGELOG.md

@@ -6,7 +6,12 @@ All notable changes to this project will be documented in this file, in reverse
 
 ### Added
 
-- Nothing.
+- [#13](https://github.com/zendframework/zend-stdlib/pull/13) adds
+  `Zend\Stdlib\Hydrator\Iterator`, which provides mechanisms for hydrating
+  objects when iterating a traversable. This allows creating generic collection
+  resultsets; the original idea was pulled from
+  [PhlyMongo](https://github.com/phly/PhlyMongo), where it was used to hydrate
+  collections retrieved from MongoDB.
 
 ### Deprecated