Some initial hacks towards multiple-infantry-per-cell. Make the pathfinder smart enough to do what we need, and remove a *lot* of stupid duplication. Needs more work.

OpenRA.Mods.RA/Cargo.cs

@@ -70,6 +70,11 @@ namespace OpenRA.Mods.RA
 			return cargo.Count == 0;
 		}
 
+		public Actor Peek(Actor self)
+		{
+			return cargo[0];
+		}
+		
 		public Actor Unload(Actor self)
 		{
 			var a = cargo[0];