Merge branch 'release/0.84' into develop
Forgot twitter API.
Use the count argument.
new fabfile pseudo-tasks helpers (logs & purge).
Database migration performance note.
Add social auth backends only if they have keys configured, else they fail.
gunicorn: do not timeout. Almost.
Retry enhancements in user import model.
Customized detail view for user imports actions.
User import retry action button.
split stats into submodule. Implement rabbitmq stats.
Add pyrabbit to requirements.
Implement RabbitMQ status template; remove queues from celery (unreliable).
version bump for 0.84.1.
Merge branch 'release/0.84.1'