Refactored openxcap script and runtime logic

• Adapt to process changes in python-application 2.8.0
• Use argparse to handle command line arguments
• Replaced --pid with --config-dir and --runtime-dir
• Added --systemd option for running as a systemd service
• Added --debug option to enable verbose logging
• Added --debug-memory option to eanble memory debugging
• Added code to wait for network to become available on startup