Atomic bulk requests

### Deliverables:
 - Endpoint that succeeds all requests or none. Nice-to-have is the option of stoping at first failure.
 - Assurance that this feature will not be broken in the future

### Solution:
 - adds the new superbulk_transactional view
 - failfast option True/False for shortcircuit acceptance of transaction
 - add tests for all features
 - updated readme