Add development.ini inline docs
Support gunicorn.conf.py file from run command
Fix duplicate loading of some subcomponents

This was responsible for sqlaclhemy session warnings and lots of
extra output on startup.
Remove graceful timeout setting

I think a timeout of 0 was interacting poorly with the pserve
reloeader. My suspicion is that the master was exiting before the
worker and the reloader was not reaping these children. Something
like this. In any case, now gunicorn exits cleanly after a moment.