Cartridge to Expose Celery as a Daemon on OpenShift

• OPENSHIFT_CELERY_BROKER_TRANS : Defines the broker type that celery will use. Current available options are: -- mongodb : DEFAULT -- amqp -- redis
• OPENSHIFT_CELERY_BROKER_URL : The connection URL for the broker, omitting the transport. For example, an amqp value may look like: guest:guest@localhost:5672//
• OPENSHIFT_CELERY_IMPORTS : Defines the modules that celery should import. Currently only supports 1 module import path

Currently only supports MongoDB as backend for queues, but in progress to support more environment variables to allow vairous backends and configurations.