Merged in feature/add_changelog (pull request #392)

Add changelog

CHANGELOG.md

@@ -0,0 +1,39 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+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
+- Set individual page title
+- Copy on write
+
+### Changed
+- Stop fetching commits when it takes too long
+- Unification of source and commits become "code"
+
+### Fixed
+- Classloader leak which caused problems when restarting
+- Failing git push does not lead to an GitAPIException
+- Subversion revision 0 leads to error
+- Create mock subject to satisfy legman
+- Multiple versions of hibernate-validator caused problems when starting from plugins
+
+## 2.0.0-rc1 - 2019-12-02
+### Added
+- Namespace concept and endpoints
+- File history
+- Global permission concept
+- Completely translated into German with all the text and controls of the UI
+- Frontend provides further details on corresponding errors
+- Repository branch overview, detailed view and create branch functionality
+- Search and filter for repos, users and groups
+- Repository Permissions roles
+- Migration step framework and wizard
+- Plugin center integration
+- Plugins can be installed (even without restart), updated and uninstalled using the new plugins overview
+- Git-LFS support (with SSH authentication)
+- Anonymous access via git-clone and API access with anonymous user
+- Cache and x-requested-with header to bundle requests
+- remove public flag from repository and migrate permissions to anonymous user