Begin work on a celery handler for submitting error asynchronously.
fix pep8 error
typo
Add docstrings to bugzscout.ext.celery.
celery.py -> celery_handler.py
Add tests for celery.
rm celery_handler.py
Add __all__ to client.py
rm celery tests.
Simplify celery extension.
Add docs about celery extension.