Adding RabbitMQ connection class.
adding crashstorage class for RabbitMQ.
Integrating our rabbitmq patches:
* Added extra checking for whether we're in a transaction
* bugfix in new_crash_source, and make durable queues
* Getting integration tests working, and a new config
* Removing extraneous tuple in processor_app.py

Also includes working configs for HBase and RabbitMQ locally
Add an __init__.py file so the RabbitMQ new crash source will load.
Merge selenamarie/merge-rabbitmq into rmq_crash_source so Selena can do a FF merge of this into that, and we can also go into the bright future together.

The merge conflict was getting her down.