Remove hardwired metadata deserialization with support for legacy metadata fields

Change-Id: Icfb159a89b7b8a390812c32ec744290a20029ea0
diff --git a/Changes b/Changes
index b325da6..e465ea2 100644
--- a/Changes
+++ b/Changes
@@ -1,10 +1,12 @@
-0.58.4 2019-01-09
+0.58.4 2019-01-10
     - [cleanup] Remove deprecated methods setLicense/getLicense,
       setTokenization/getTokenization, setLayerInfo/getLayerInfo,
       setField/getField (including json serialization)
       (diewald)
     - [cleanup] Remove redundancy for meta field setting in
-      AbstractDocument and FieldDocument.
+      AbstractDocument and FieldDocument (diewald)
+    - [cleanup] Remove hardwired deserialization of legacy metadata
+      fields  (diewald)
 
 0.58.3 2018-12-17
     - [feature] Introduced attachements as meta data fields