PEP8
Merge pull request #375 from alphagov/pep8

PEP8
Quieten pip in travis builds
Merge pull request #376 from alphagov/quieten-pip

Quieten pip in travis builds
Add Celery dependency
Add transformers module with celery worker and skeleton write task
Add dev credentials for transformer rabbitmq user
Initial message dispatch implementation
Add rabbitmq test credentials