Don't set up logging if settings module already has LOGGING defined.

If LOGGING is defined, you can add something like this to LOGGING.loggers:

        'axes.watch_login': {
            'handlers': ['syslog'],
            'level': 'INFO',
        },
Refactor for better logical flow.
Merge pull request #31 from csghormley/30_logging

To fix issue #30.