Quieter version of rla_export, delivered 2017-11-15

As delivered to CDOS

Merge pull request #894 from FreeAndFair/cvrs-to-audit-fetching

CVRs to audit fetching

Merge pull request #891 from FreeAndFair/minor-bug-fixes

Fixed a bug in updating ballot manifest file status.

Delivered to CDOS 2017-11-01

Delivered to CDOS 2017-10-30

Delivered to CDOS 2017-10-30T22:00

Merge pull request #852 from FreeAndFair/version-bump

Updated version number, updated backoff to use a single Random.

Merge pull request #835 from FreeAndFair/fix-parsing-cleanup

Update to fix a constraint error when cleaning up old records.

drop leading "v" for Python Build Reasonableness