harvestingkit: first implementation of harvestingkit_cli

* harvestingkit_cli.py: Implements a console interface that let's the user execute the harvesting scripts from one central place. Also provides a way to change the user credentials for those scripts.
    
* configparser.py: Since the user credentials for the harvesting moved to user_config.cfg, configparser provides a way to load those credentials.
    
* scoap3utils.py: changed the logger in create_logger to log to the console as well as to the file.
    
* setup.py: Copies the user_config.cfg file to one of the places specified in setup.py.