----- version 2.2.0 -----
* port to argparse

----- version 2.1.1 -----
* add a manpage
* drop python3.5 support
* add some unit tests

----- version 2.1.0 -----
* Validate <directory>
* Implement CI (lint + tests)
* Write a setup.py
* Change the name of the module to rename_flac.py (PEP8)

----- version 2.0.1 -----
* Add a new tag (composer)
* Fix the missing metadata failure bug

----- version 2.0 -----
* Now in Python3

----- version 1.1 -----
* A bunch of small fixes

----- version 1.0 -----
* Initial commit
