Osx

@albertogaitan this is for you. Check out my comments here.
For configuring log levels, I like things to be able to be set via environmental variables, that way I can call the script like `LOG_LEVEL=DEBUG python humanfinder.py`. To do that you'd need to get into the `os.environ`, for example:

```python
import logging

log_levels = {
  'DEBUG': logging.DEBUG,
  'INFO': logging.INFO,
}

logging.basicConfig(level=log_level[os.environ.get('LOG_LEVEL', 'INFO')])
```