#17 [map enhance] distance point to point and range

[gionnico]

How about a tool to measure point-point distance in map?
And make distance correlated to speed (if it isn't already). Like distance 10 means 30 seconds if your ship goes 20 speed. Or something like that. And document this fact.

And another one: something like you keep pressed "d" in map view and a green range is drawn from selected ship/planet to mouse pointer so you can see easily how distant is a planet or another. Maybe in this case you could also write (ETA) based on the ship's speed.

[mrevenga]

Added to TODO list