Make bots first-class players.

- Bots have their own Clients, with unique ClientIDs
 - Hosts can set bot team/color in the lobby
 - Bots are kicked when switching to a smaller map without enough slots
 - Order validator assumes that only client 0 has permission to issue bot orders

mods/ra/chrome/gamelobby.yaml

@@ -98,15 +98,6 @@ Background@SERVER_LOBBY:
 							Y:2
 							Width:20
 							Height:20
-						Label@SPECTATOR:
-							Id:SPECTATOR
-							Text:Spectator
-							Width:278
-							Height:25
-							X:160
-							Y:0
-							Align:Center
-							Font:Bold
 				Container@TEMPLATE_REMOTE:
 					Id:TEMPLATE_REMOTE
 					X:5
@@ -170,15 +161,6 @@ Background@SERVER_LOBBY:
 							Y:2
 							Width:20
 							Height:20
-						Label@SPECTATOR:
-							Id:SPECTATOR
-							Text:Spectator
-							Width:278
-							Height:25
-							X:160
-							Y:0
-							Align:Center
-							Font:Bold
 				Container@TEMPLATE_EMPTY:
 					Id:TEMPLATE_EMPTY
 					X:5