Air Traffic Control & Map Lore

Air Traffic Control from Polaris. Every TBD to TBD minutes, a radio
exchange happens between a ship and Cyberiad Space Control, ranging from
system transfer permission to declaring an emergency.

Refactored MAP_NAME into /datum/map files. This also allows for built-in
map lore (really just the name and system, which is only used for ATC).

Secondary commit will adjust all of the lore to match our own instead of
Polaris's.

code/world.dm

@@ -63,11 +63,10 @@ var/global/list/map_transition_config = MAP_TRANSITION_CONFIG
 		master_controller.setup()
 		sleep_offline = 1
 
-	#ifdef MAP_NAME
-	map_name = "[MAP_NAME]"
-	#else
-	map_name = "Unknown"
-	#endif
+	if(using_map && using_map.name)
+		map_name = "[using_map.name]"
+	else
+		map_name = "Unknown"