- Make updateFrequency a normal property
- Core auto-calculate updateFrequency
- Create API export class that creates the standardized API regardless of IPC mechanism.  That way, the same API can be used over websockets too.
- Refactor obd2 plugin with AsyncQueue.  Use thread-safe updateProperty.
- source export from database plugin does not reflect the source in the database
- grep all the TODOs in the code and do them
- implement no-value for AbstractPropertyType
- add timestamp processing for CAN data