Department and Round Goals (#7369)

* Baseline work for Department Goals. Implements round-end stats, based in 3 categories of roughly-more-interesting to less interesting.

* Active Goal Separation.

* Map.

* Actually does the second half of this in this PR instead of a different one.

code/modules/mining/mine_turfs.dm

@@ -554,6 +554,8 @@ turf/simulated/mineral/floor/light_corner
 		for (var/i = 1 to mineral.result_amount - mined_ore)
 			DropMineral()
 
+	GLOB.rocks_drilled_roundstat++
+
 	//destroyed artifacts have weird, unpleasant effects
 	//make sure to destroy them before changing the turf though
 	if(artifact_find && artifact_fail)