Ahaha. If it's not broken, fix it. If it is, fix it too.
Bug fix for #2334.
On server start, clear is_running on any old chronograph jobs.
Required import for clearing of is_running on Jobs.
Merge pull request #2337 from cpauya/feature/2334-Cannot-sync-server-on-Mac-to-central-server

Bug fix for #2334.
Merge pull request #2340 from learningequality/release-0.12.0

Release 0.12.0