DOC: changelog

CHANGELOG.rst

@@ -14,6 +14,19 @@ Added
   columns per visit into single columns indexed by both subject ID and visit.
 
 
+Changed
+^^^^^^^
+
+
+* The ``--index`` option now supports specification of multiple index columns
+  for each input file.
+* The :func:`.fileinfo.has_header` function has been modified to be more
+  lenient.
+* The :mod:`.importing` module has been internally refactored to improve
+  code cleanliness.
+* Various minor internal API changes.
+
+
 1.6.0 (Wednesday 11th December 2019)
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