Avoid use of wildcard into example
Review module structure
Use specific exceptions
Fix DEBUG initialisation
Fix DEBUG output
Reorganize MSS methods
Review output filename process
MSSLinux: review imports
MSSImage: review file creation
MSSImage: ensure image filename is .png
Add a timer when trying MSS from the module itself
Update import and return value in main()
Better display in main()
MSSImage: little optimization
Fix misspellings using 'codespell' tool
Possibility to append '--debug' to the command line
Update documentation about the '--debug' argument
MSSLinux: refactor enum_display_monitors(), add XFCE4 support
MSSLnux: fix typo in comment
MSSMac: little refactoring into enum_display_monitors()