Add changelog for clustertools (#522)

* add changelog for clustertools

* remove incorrect changelog line

cluster_tools/Changelog.md

@@ -0,0 +1,31 @@
+# Change Log
+
+All notable changes to the cluser_tools library are 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/) `MAJOR.MINOR.PATCH`.
+For upgrade instructions, please check the respective *Breaking Changes* sections.
+
+## Unreleased
+[Commits](https://github.com/scalableminds/webknossos-libs/compare/v0.8.28...HEAD)
+
+### Breaking Changes
+
+### Added
+
+### Changed
+
+### Fixed
+
+
+## [0.8.28](https://github.com/scalableminds/webknossos-libs/releases/tag/v0.8.28) - 2021-12-09
+[Commits](https://github.com/scalableminds/webknossos-libs/compare/v0.8.27...v0.8.28)
+
+This module did not exist in 0.8.28. See the following notes about the mono-repo migration
+
+# Mono Repo Migration
+
+Before 0.8.29, cluser_tools did not exist in this repository. Instead, v1.1 to v1.61 were maintained in [this repository](https://github.com/scalableminds/cluster_tools/releases).
+Note that 0.8.29 is newer than 1.61.
+The poor naming was a sacrifice during the mono-repo migration which enforced synchronized versioning between all packages (e.g., wkcuber and webknossos).
+To avoid version conflicts in the future, the first major release for webknossos-libs will be v2.