[bug 979266] Move kombu to vendor/src. Update to 2.5.15
[bug 979266] Move django-celery to vendor/src/ Update to 3.0.23.
[bug 979266] Move celery to vendor/src. Update to 3.0.24.
[bug 979266] Add amqp v1.4.2 replacing amqplib v1.0.2
[bug 979266] Add billiard v2.7.3.34
[bug 979266] Code changes for celery 3.0.24.