Fixed VC deserialization and double negations in
CollectionBuilder.Group

Change-Id: Iabfc12324f443a71421fa6f06d3d97dfd58a124b
diff --git a/Changes b/Changes
index 3949571..dbea656 100644
--- a/Changes
+++ b/Changes
@@ -13,6 +13,8 @@
     - [bugfix] Fix wrong behaviour of negative constraints in and-Groups
       of VCs (#42; diewald)
     - [feature] Adding loading namedVC from gz (margaretha)
+    - [bugfix] Fixed VC deserialization and double negations in 
+      CollectionBuilder.group (margaretha)
 
 0.57 2018-04-05
     - [feature] Support text queries in metadata