added a changelog file

# Change Log

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](http://keepachangelog.com/)

and this project adheres to [Semantic Versioning](http://semver.org/

## [Unreleased]

### Added

### Changed

### Fixed 

- InjectCommand blocks if the system is down @aorlati

##