added changelog

CHANGELOG.md

@@ -0,0 +1,23 @@
+# 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]
+
+### Added
+- Ability to set up default environment for Skywire.
+- Command-line interface.
+- Updating `skywire-updater` should also copy over new scripts.
+
+### Changed
+- Config file should be under a CLI flag.
+- Config file should be search in the following order: CLI flag, ENV, `~/...`, `/usr/local/...`.
+
+## [0.1.0] - 2019-03-06
+
+### Added
+
+- First release of `skywire-updater` for mainnet.
+