text: Title: [Migrated] Overhaul Logging Subsystem
  Body: Originally from: https://github.com/Miserlou/Zappa/issues/1305 by [Miserlou](https://github.com/Miserlou)
  
  - Add and document proper log-level handling
  - Redefine more sane defaults
  - Add event-type and event-target based log tail filtering