Changed some global_list stuff:

>tried to make the comments less confusing.
>Removed the procs for rebuilding the lists (they weren't meant to be used and half were broken anyway).
>added a directory. It maps ckey to client like so directory[ckey] = client. It could be used for PMs, banning, and various other admin tools rather than using \ref[]
>var/list/admins is now a list of clients whom are admins.
>var/list/admin_datums is what var/list/admins used to be. A map from ckey -> admin datum
Most of this is so I can add modular admin ranks in a non-horrendous way and fix some existing issues.
>var/list/client_list is now var/list/clients (laziness sorry)
>removed some needless loops and stuff.

git-svn-id: http://tgstation13.googlecode.com/svn/trunk@4951 316c924e-a436-60f5-8080-3fe189b3f50e

code/defines/procs/statistics.dm

@@ -21,10 +21,7 @@ proc/sql_poll_players()
 proc/sql_poll_admins()
 	if(!sqllogging)
 		return
-	var/admincount = 0
-	for (var/client/C in admin_list)
-		if(C)
-			admincount += 1
+	var/admincount = admins.len
 	var/DBConnection/dbcon = new()
 	dbcon.Connect("dbi:mysql:[sqldb]:[sqladdress]:[sqlport]","[sqllogin]","[sqlpass]")
 	if(!dbcon.IsConnected())