Refactored random map generator system and added several terrain generators.

Created a global list to track base turfs for explosions/shuttle moves.
Remaps the asteroid to be a moonlet. Tidies up some references to 'asteroid', removes moonbase from the accessible z level list.

code/world.dm

@@ -72,9 +72,20 @@ var/global/datum/global_init/init = new ()
 	// This is kinda important. Set up details of what the hell things are made of.
 	populate_material_list()
 
-	//Create the asteroid Z-level.
 	if(config.generate_asteroid)
-		new /datum/random_map(null,13,32,5,217,223)
+		// These values determine the specific area that the map is applied to.
+		// If you do not use the official Baycode moonbase map, you will need to change them.
+		//Create the mining Z-level.
+		new /datum/random_map/automata/cave_system(null,1,1,5,255,255)
+		//new /datum/random_map/noise/volcanism(null,1,1,5,255,255) // Not done yet! Pretty, though.
+		// Create the mining ore distribution map.
+		new /datum/random_map/noise/ore(null, 1, 1, 5, 64, 64)
+		// Update all turfs to ensure everything looks good post-generation. Yes,
+		// it's brute-forcey, but frankly the alternative is a mine turf rewrite.
+		for(var/turf/simulated/mineral/M in world) // Ugh.
+			M.updateMineralOverlays()
+		for(var/turf/simulated/floor/plating/airless/asteroid/M in world) // Uuuuuugh.
+			M.updateMineralOverlays()
 
 	// Create autolathe recipes, as above.
 	populate_lathe_recipes()