Implemented QueryContextRewrite (#755)

Change-Id: I14f62131063c114acdfa5cb3cb6f9eeff169d6cb
diff --git a/Changes b/Changes
index 3893aa6..06cc8b4 100644
--- a/Changes
+++ b/Changes
@@ -3,6 +3,8 @@
 - Add institution & landingPage to the resource web-service (#777)
 - Make URL mandatory for plugin registration (#573)
 - Remove hidden group from test database
+- Implemented QueryContextRewrite (#755)  
+
 
 # version 0.75