adding changelog

CHANGELOG.md

@@ -1,9 +1,23 @@
-# CHANGELOG
+# Changelog
+All notable changes to this project will be documented in this file.
 
-## v0.3
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [1.0.0] - 2020-07-17
+### Added
+- Ansible output is now in json (ANSIBLE_STDOUT_CALLBACK=json)
+- added PlaybookResults to parse playbook's json results
+- added ExitCode on Executor in order to provode explicit playbook fails
+
+### Changed
+- Vars renamed making names more compact
+
+## [1.0.0] - 2020-07-17
+### Added
 - PlaybookCmd has a Write attribute, which must be defined by user.
 
-## v0.2
+## [1.0.0] - 2020-07-17
+### Added
 - Change package name to ansibler
 - Use package github.com/apenella/go-common-utils
-