Update changelog

CHANGELOG.md

@@ -5,6 +5,19 @@ This document tracks all important changes to the Motion Bank Transcoding Servic
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+- [cote](https://github.com/dashersw/cote)
+responders for metadata and conversion
+
+### Removed
+
+- Metadata responders only use URLs,
+no more annotation objects
+
+
 ## [1.0.0] - 2018-12-04
 
 ### Added