See #141
Basically this tries to parse config values with JSON, if that fails,
the value is interpreted as string.
I'd greatly appreciate feedback on this and #141
- Custom job queue with workers based on threads.
- Collection discovery is now done in a separate thread. Due to the
gained flexibility, we could do the sync actions in separate threads
too?
- The processes parameter has been removed, the related new option is
only available on the CLI.
