Minor mining mechanic manipulations

[Cogwerks]

Superdense ore generation wasn't half-bad on Shroom Mining; with the rearrangement of ores with Cogstation, these extractor squares have dramatically decreased in number.

Half of the little four-squares around space are hardly dense at all! There's about two deposits currently on map if I recall correctly.

uhhhh with a few exceptions of things shuffled to make room for the prison and the listening post, the mining field is completely the same between both maps