Added extraction method for documents in archives

Change-Id: Id4ea7d9801a5750c77f81a2251d389adb6e06d31
diff --git a/Changes b/Changes
index f3f575a..b19f50a 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,6 @@
+0.22 2016-10-26
+        - Added support for document extraction
+
 0.21 2016-10-14
         - Improved Windows support