Remove variable dependency for metadata field names and store all
in a MetaFields object. Also remove deprecated methods for
metdata field access.

Change-Id: I55f4ab7ada7c94a7b6c5211a43a6e5a9dd6c2260
diff --git a/Changes b/Changes
index 8a293e9..5f36b1d 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,9 @@
+0.58.4 2019-01-08
+    - [cleanup] Remove deprecated methods setLicense/getLicense,
+      setTokenization/getTokenization, setLayerInfo/getLayerInfo,
+      setField/getField (including json serialization)
+      (diewald)
+
 0.58.3 2018-12-17
     - [feature] Introduced attachements as meta data fields
       (fixes #49) (diewald).