Transition `print()` statements in API to `logging` module

[ymahlich]

This specifically concerns the info print outs during download and loading:

Example in Download routine:

coderdata/coderdata/download/downloader.py

Line 104 in 8fadc34

print(f"Downloaded '{file_url}' to '{file_name}'")

Example in cd.load() rountine:

coderdata/coderdata/dataset/dataset.py

Line 433 in 8fadc34

print(f"Importing raw data ...", file=sys.stderr)

Those could be moved to logging routine for easier and more robust handling. See for example:

coderdata/scripts/prepare_data_for_improve.py

Line 14 in 0c724de

logger = logging.getLogger(__name__)

coderdata/scripts/prepare_data_for_improve.py

Lines 99 to 111 in 0c724de

	if args.LOGLEVEL == 'info':
	loglevel = logging.INFO
	elif args.LOGLEVEL == 'debug':
	loglevel = logging.DEBUG
	else:
	loglevel = logging.WARNING
	logging.basicConfig(
	format="{asctime} - {levelname} - {message}",
	style="{",
	datefmt="%Y-%m-%d %H:%M",
	level=loglevel
	)

coderdata/scripts/prepare_data_for_improve.py

Line 130 in 0c724de

logger.info("importing datasets...")