Misc changes

* Use Pair instead of KeyValuePair
* double -> var
* Butcher XML comments
* Change WinState default to Undefined and use it instead of the new GameOutcome
* Other changes

OpenRA.Game/Player.cs

@@ -23,7 +23,7 @@ using OpenRA.Traits;
 namespace OpenRA
 {
 	public enum PowerState { Normal, Low, Critical };
-	public enum WinState { Won, Lost, Undefined };
+	public enum WinState { Undefined, Won, Lost };
 
 	public class Player :  IScriptBindable, IScriptNotifyBind, ILuaTableBinding, ILuaEqualityBinding, ILuaToStringBinding
 	{