[aprssig] Traffic Objects (new subject)

[Chris Kantarjiev]

When I started looking into this, I had all the traffic data at my
fingertips. I just couldn't get it into APRS-IS in a sensible way.

Now, I don't (we sold that part of the business). 
I'll see if I can resurrect the technology. It's not hard, 
just tedious; the data is public. Every state formats it
differently. Some make access difficult.