Implemented relation queries with regex.

Change-Id: I1dafc835f6034d90a350d9688acdcf54bac28124
diff --git a/Changes b/Changes
index f39c756..a8f1cbf 100644
--- a/Changes
+++ b/Changes
@@ -1,4 +1,4 @@
-0.55.9 2017-11-16
+0.55.9 2017-12-19
         - [bugfix] Serialize token identifier correctly for
           new corpora with text siglen (diewald)
         - [bugfix] Extend bytebuffer for relation payloads (diewald)
@@ -6,6 +6,8 @@
           repositioning can result in exceeding the string (diewald)
         - [bugfix] Set correct start position of token-token-relations
           in snippet generation (diewald)
+        - [bugfix] Token cannot contain another token or element (margaretha)
+        - [feature] Enabled searching relation query using regex (margaretha)
 
 0.55.8 2017-09-05
         - [feature] Retrieve and display pagebreaks (diewald)