Related to #1719 BREAKING: The uwsgi packages and configuration files (`/etc/airtime/libretime-api.ini`) should be removed from the system.
- add django settings module documentation - use default for previously required fields BREAKING CHANGE: The API command line interface require the configuration file to be present. The default configuration file path is `/etc/airtime/airtime.conf`
BREAKING CHANGE: moved production api log file from '/var/log/airtime/api.log' to '/var/log/libretime/api.log'