Renamed management command to all lower case to be inline with Django convention, added '.gitignore', improved the 'no unzip' utility error message, and removed 'files already downloaded' skip as the current assumption could lead to unexpected error if unzipping has failed; ideally the check should be based on file time stamp as seen here: https://github.com/danielsokolowski/django-cities/blob/master/cities/management/commands/cities.py#L98.