I'm adding beacon.java. This is an incomplete version of the collision calculation based off of the beacon signals the phones will have themselves and what they will bounce off one another. so far, they calculate a line of best fit, as well as if there is an imminent head on collision or perpendicular collision possible.
Merge branch 'master' of https://github.com/cdelorme/collision-avoidance-warning
added Beacon.java, which is almost complete, lol