Add CHANGELOG #47

Signed-off-by: Steven Esser <[email protected]>

Author: steven-esser

CHANGELOG

@@ -0,0 +1,29 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+
+## [Unreleased]
+
+## [1.2] - 2019-11-14
+### Added
+- Add ability to render WITH expression wrapped in parenthesis
+
+### Fixes
+- Fix anomalous backslashes in strings
+
+### Changed
+- Update the thirdparty directory structure. 
+
+## [1.0] - 2019-10-16
+### Added
+- new version of boolean.py library
+- Add ability to leave license expressions unsorted when simplifying
+
+### Changed
+- updated travis CI settings
+
+## [0.999] - 2019-04-29
+- Initial release
+- license-expression is small utility library to parse, compare 
+  and simplify and normalize license expressions.