Updated change log

Author: gabrielbull

CHANGELOG.md

@@ -2,7 +2,13 @@
 
 This is the changelog between releases of PHPWord. Releases are listed in reverse chronological order with the latest version listed on top, while additions/changes in each release are listed in chronological order. Changes in each release are divided into three parts: added or change features, bugfixes, and miscellaneous improvements. Each line contains short information about the change made, the person who made it, and the related issue number(s) in GitHub.
 
-## 0.9.0 - Not yet released
+## 0.9.1 - 27 Mar 2014
+
+This is a bugfix release for PSR-4 compatibility.
+
+- Fixed PSR-4 composer autoloader - @AntonTyutin
+
+## 0.9.0 - 26 Mar 2014
 
 This release marked the transformation to namespaces (PHP 5.3+).