- Refactor netwatch_event_manager to dmrwatch_event_manager to
generalize.
- Fix bug with struct_is_valid? to make it more resilient.
- Rationalize the namespace for the channels and topics and message
names.
- DRY up the JS for adding map markers.
- Add simple (too simple) clock tick.
Add a new DNR-MARC radio ID data importer and in-memory cache. Run it hourly to keep data fresh.