Do Refactoring: Add initial CHANGELOG.md

Author: tajbender

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).
+
+## Convention
+### Added
+- for new features.
+### Changed
+- for changes in existing functionality.
+### Deprecated
+- for soon-to-be removed features.
+### Removed
+- for now removed features.
+### Fixed
+- for any bug fixes.
+### Security
+- in case of vulnerabilities.
+
+## [Unreleased]
+
+
+## [0.1.0] - 2017-08-17
+### Added
+- Released first official release on GitHub: v0.1.0