Update changelog

Author: cshaver

CHANGELOG.md

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+# 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/).
+
+## 1.1.0
+### Added
+- Option to output diff to file
+- Simple test cases
+
+### Fixed
+- Debugger now debugs
+- Support for Node v0.12
+
+## 1.0.6 - 2016-09-19
+### Added
+- Option to pass absolute paths in through the cli
+
+## 1.0.5 - 2016-05-06
+## 1.0.4 - 2016-03-11
+## 1.0.3 - 2016-03-10
+## 1.0.2 - 2016-03-09
+## 1.0.1 - 2016-03-09
+
+[Unreleased]: https://github.com/cshaver/css-ast-diff/compare/master...develop
+[1.0.6]: https://github.com/cshaver/css-ast-diff/compare/v1.0.5...v1.0.6
+[1.0.5]: https://github.com/cshaver/css-ast-diff/compare/v1.0.4...v1.0.5
+[1.0.4]: https://github.com/cshaver/css-ast-diff/compare/v1.0.3...v1.0.4
+[1.0.3]: https://github.com/cshaver/css-ast-diff/compare/v1.0.2...v1.0.3
+[1.0.2]: https://github.com/cshaver/css-ast-diff/compare/v1.0.1...v1.0.2
+[1.0.1]: https://github.com/cshaver/css-ast-diff/compare/v1.0.0...v1.0.1