Improve spec coverage for observers
Make feed factory easier to use
Expand messages that observer tester looks for
Improve feed runner specs, add logging

- Add DEBUG level logging for event build errors as well as missed
  records.
- Improved unit test coverage for observer notifications
Handle record errors in status observer
Add record/event error output to coverage
Log error message record/event errors
Merge pull request #99 from justfalter/log_event_errors

Log event errors