Updates CHANGELOG file to include new changes.

Author: Potherca

CHANGELOG.md

@@ -1,16 +1,42 @@
 # Change Log
 All notable changes to the `flysystem-github` project will be documented in this 
-file. This project adheres to [Semantic Versioning](http://semver.org/).
+file. This project adheres to the [keep-a-changelog](http://keepachangelog.com/) 
+and [Semantic Versioning](http://semver.org/) conventions.
 
-## 0.1.0 - 2015-07-18 - Read functionality
+<!--
+## [Unreleased][unreleased]
 ### Added
-Read functionality and Github API authentication have been implemented.
+### Changed
+### Deprecated
+### Removed
+### Fixed
+### Security
+-->
+
+## v0.2.0 - 2015-07-21 - Improvements and UnitTests
+
+### Added
+- Adds automated checks (a.k.a. unit-tests) for the Adapter, Client and Settings classes. 
+- Adds various utility files for Travis builds, Coveralls and Composer
+
+### Changed
+- Makes the PHPUnit configuration more strict
+- Renames the Client class to "Api"
+
+## v0.1.0 - 2015-07-18 - Read functionality
+
+### Added
+- Read functionality and Github API authentication have been implemented.
+
+## v0.0.0 - 2015-05-11 - Project Setup
 
-## 0.0.0 - 2015-05-11 - Project Setup
 ### Added
-Set up project basics like .gitignore file, PHPUnit Configuration file, 
+- Set up project basics like .gitignore file, PHPUnit Configuration file, 
 Contributing guidelines, Composer file stating dependencies, MIT License, README 
 file and this CHANGELOG file.
 
-[unreleased]: https://github.com/potherca/flystystem-github/compare/v0.1.0...HEAD
+[unreleased]: https://github.com/potherca/flystystem-github/compare/v0.2.0...HEAD
+[0.2.0]: https://github.com/potherca/flystystem-github/compare/v0.1.0...v0.2.0
 [0.1.0]: https://github.com/potherca/flystystem-github/compare/v0.0.0...v0.1.0
+[keep-a-changelog]: http://keepachangelog.com/
+[Semantic Versioning]: http://semver.org/