* Encode/Decode files in UTF-8
* Use helper function in ansible
* Add an integration test
* Use emoji in test data.
* add changelog
* Also support non-ascii chars in filepath and add tests about this.
* Also use non-ascii chars in replaced text and ensure not to break cron syntax.
* rename self.existing to self.n_existing
* rename crontab.existing to crontab.n_existing
