Add changelog file

CHANGELOG.md

@@ -0,0 +1,25 @@
+# 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
+- Added CHANGELOG file ([#9](https://github.com/egel/tmux-gruvbox/issues/9))
+- Added theme installable through TPM ([#4](https://github.com/egel/tmux-gruvbox/issues/4))
+
+### Changed
+### Deprecated
+### Removed
+### Fixed
+- Fixed spelling in the installation script ([#2](https://github.com/egel/tmux-gruvbox/issues/2))
+
+### Security
+
+## [1.0.0] - 2016-07-26
+### Added
+- Added dark gruvbox colorscheme
+
+[Unreleased]: https://github.com/egel/tmux-gruvbox/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/egel/tmux-gruvbox/compare/v0.0.0...v1.0.0