Graphs for dump1090 -- my version with install script

[bive]

@wiedehopf

Ok, maybe calling it noise would be a mistake.

minimum signal is more accurate, there is already a database for that but it’s not currently plotted.

i’ll just add it to the graph.

Have I missed an update or is it still not plotted?

For me, with a slight bug in the ability to see colours correctly, it’s quite hard to see the blue-ish(?) line on the green background. It kind of blends in with the green…