BUGFIX: Moved case 'a' in ParseCommandLineOptions() to the config_present == empty option switch.
If atoms were added to an newly-created and empty configuration file, this would not work, as the config file was still empty and hence config_present != present, so far needed for case 'a'. Now, it is moved in the vicinity of case 'P', where it belongs to and if the first atom is added, config_present is set to present.