Command line arguments for pyfdax

[chipmuenk]

Starting pyfdax creates a config and a logging config in some user directory. This process could be enhanced by processing user option using sys.argv or argparse, e.g.

• -h for help
• -r to reset / replace existing log files (e.g. to reset them to default options)
• -d for setting user dir, temp dir, log dir, ...
• -i for printing infos on paths and files

Non-default directory settings need to be stored in the pyfda file structure itself, probably requiring elevated access rights to achieve persistence.