Improve logging throughout the package

[arunoruto]

Currently, YASF's logs are mixed with those of other packages. A filtering system should be applied to separate the logs and, therefore, enable a cleaner log output for YASF.

Such an option is possible with loguru library.

[arunoruto]

The logging has been improved with 05e2cac

To print the logs, following lines are needed:

import logging
logger = logging.getLogger("yasfpy")
sh = logging.StreamHandler()
sh.setFormatter(logging.Formatter('[%(asctime)s] %(name)-18s %(levelname)-7s: %(message)s'))
logger.addHandler(sh)
logger.setLevel(logging.INFO)