Address several rewrite issues.

Update VirtualCorpusRewrite Remove Owner (#779)
Add source to QueryReferenceRewrite (#783) and VirtualCorpusRewrite
(#780)

Change-Id: I53fbae553758d8319d9438afe761f3cc7299cdd0
diff --git a/Changes b/Changes
index 43009a8..3b27f54 100644
--- a/Changes
+++ b/Changes
@@ -5,6 +5,8 @@
 - Remove hidden group from test database
 - Implemented QueryContextRewrite (#755)
 - Replace operation:insertion with operation:injection (#778) 
+- Update VirtualCorpusRewrite Remove Owner (#779)
+- Add source to QueryReferenceRewrite (#783) and VirtualCorpusRewrite (#780).
 
 
 # version 0.75