Move Jia settings

This moves Jia settings to a `conf` directory like Kronos and Metis have.

The Metis `runserver` used to override `debug` and `port` in the settings file even if they were not specified by the user on the command line, so the changes to that file fix that.
rather than testing for ints, etc., use kwargs like `type`, `default`, and `required`.  Example:

https://github.com/Locu/chronology/blob/master/analytics_tools/scripts/stream_copier.py#L82