Add CHANGELOG file

Author: llaske

CHANGELOG.md

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+# 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).
+
+## [Unreleased]
+
+## [1.0.0] - 2018-07-14
+### Added
+- Separation from Sugarizer repository
+- Standalone server (Apache server no longer need)
+- Handle login/password
+- Full dashboard with information on activities, users and journal
+- SSL support
+
+### Changed
+- Improved API
+- Docker now need only 2 containers
+- .ini file location now depend of NODE_ENV variable