Misc things - Related to merge (#1280)

Redefine span() to be a macro. Because we don't need it to be a proc ever again.
Rebuild the .all_changelog.yml file to have Bayport stuff at the bottom (onto which we'll add our own shit from this cycle).
Rebuilt the .html file for changelogs to correspond to the above change.
Modified download programs to actually use seconds.

code/controllers/Processes/ai.dm

@@ -1,24 +0,0 @@
-var/list/datum/list_of_ais = list()
-
-/datum/controller/process/ai/setup()
-	name = "ai"
-	schedule_interval = 2 SECONDS
-	start_delay = 17
-
-/datum/controller/process/ai/doWork()
-	for(last_object in list_of_ais)
-		var/datum/ai/AI = last_object
-		if(isnull(AI.gcDestroyed) && istype(AI))
-			try
-				if(AI.process() == PROCESS_KILL)
-					list_of_ais -= AI
-			catch(var/exception/e)
-				catchException(e, AI)
-			SCHECK
-		else
-			catchBadType(AI)
-			list_of_ais -= AI
-
-/datum/controller/process/ai/statProcess()
-	..()
-	stat(null, "[list_of_ais.len] AI\s")