Various modules to help with input and output:
- cmdparse: parser for minimalistic commands (keyword and zero or more arguments)
- keyvars: read in INI-files and fill in the values of the variables automatically, can also save the data in an INI-file
- progressbar: present a progress bar on the screen (supports different styles)
- positional_formatting: use an alternative format string (inspired by Python's positional notation) to create a string containing the values of variables