Switch Asphalt and Coal tiles' map view colors

[manslaughter]

Goal

All other tiles match their color in map and overhead view, but the coal tiles are darker in overhead view but lighter in map view.

Below is the in-game overhead view textures (outside) and their respective map view colors (inside).

I believe the only change needed is editing the map_color of the appropriate files, so that asphalt is rgba 50,50,50,1 and coal is 0,0,0,1.
https://github.com/pyanodon/pyindustry/blob/master/prototypes/tiles/py-asphalt.lua#L78
https://github.com/pyanodon/pyindustry/blob/master/prototypes/tiles/py-coal-tile.lua#L83

Players using Refined concrete plus Asphalt might not be happy that the two are the same color after making this change; consider using a rgba such as 20,20,20,1 for asphalt to differentiate it. This would make it about as half as dark as Refined concrete, and slightly darker than Black Refined concrete.

Why?

Making the map view colors match the overhead view colors helps with deciding which tiles to use if you are trying to find a specific tile to make a specific color in the map view.