Merge pull request #1212 from demaagdk/JNAP

Mitigate RabbitMQ excessive file creation.  (TESTED BUT NEEDS MORE QA)
Add support for feature factory save in worker backfill
Merge branch 'JNAP' of github.com:sightmachine/SimpleSeer into JNAP
Bug fixes to feature factories
- Incorrect json encoding for nested structures
- No features returned if saveFactory was tru