- Customizable fun messages. Should it be an option with Funlog->new ? Should it be choosen at make time?
	- For now, it is a separate module. Maybe messages should be in an other separate file.
- maybe code and/or speed improvement ;)
- check if cosmetic if 1 char long
- Improve testing codes
- Maybe use Color::Output. But I'm afraid it will slow the things a lot.
- the function should return error codes. Maybe
