Introduced benchmark system
diff --git a/Changes b/Changes
index 222ff09..f06d174 100755
--- a/Changes
+++ b/Changes
@@ -1,6 +1,9 @@
 0.21 2016-07-04
 	- Use textSigle for API communication instead of
 	  {corpus,doc,text}ID.
+  - Added alert to hint helper.
+	- Improved menu creation.
+	- Introduced benchmark system.
 
 0.20 2016-05-25
 	- Improved menu using sliders.