Check system locale
Check system locale

If the Python3 interpreter doesn't find locale environment variables, it
emulates basic ASCII. Log a warning in this case, since files containing
non-ASCII characters might cause errors.

Fixes https://github.com/DocMarty84/koozic/issues/22

DocMarty84/oomusic,DocMarty84/oomusic,nicolasmartinelli/oomusic,nicolasmartinelli/oomusic