Scheduled Jobs and Common Logging

New

Per-queue cron-style scheduler implements the long-standing scheduler TODO.
The web server's launch code and router are melded into the RQ::Main Sinatra app.
Logs are now consolidated into log/queuemgr.log, include queue logs, and newly added web logs.

Changed

The coalesce and coalesce_param fields now have consistent and lenient truthiness checking.