Feature request: Support for objects from other applications.

[Supermagnum]

Display objects provided by another applications and allow navigation to them.

These objects could be in fixed locations or they could be moving. (e.g. car transmitting its location from a GPS receiver)
Properties would include latitude, temperature, longitude, altitude, speed, direction, name, comment, time last heard, and symbol (house, weather station, car, boat, airplane, etc.)

This looks like an example of a interesting hack: https://github.com/N2ZLC/dire_wolf_to_navit

Perhaps messages over a UDP network to feed in only the changes in objects could be used?

Relevant:
#982