add CHANGELOG

CHANGELOG.md

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+# Change Log
+All notable changes to this project will be documented in this file.
+
+## [Unreleased]
+### Added
+- compress function
+- silent mode
+
+## 0.2 - 2016-08-29
+### Added
+- The program create the file "ERRORS[yyyy-mm-dd-H:M:S]" with the last error
+### Changed
+- The error messages printed in the stderr
+### Fixed
+- Errors in the packed and unpacked function
+
+## 0.1 - 2016-08-02
+### Added
+- Man pages
+- function packaging directory
+- README.md