Add changelog

CHANGELOG.md

+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+
+## [2.34] - 2018-11-03 (@budparr)
+
+### Added
+
+- Add a changelog.
+
+### Changed
+
+- Run Ananke with Hugo v0.50