remove duplicate import
Use celery for async tasks; with rabbitmq as broker
Merge branch 'master' of github.com:asmaps/hopper.pw
Finally celerybeat works!

Learnings:
    - It's CELERYBEAT not CELERY_BEAT
    - for sqlite, do not use user 'nobody'
provide plural name for model
Merge pull request #20 from bronsen/master

celery in, huey out