Progress on tutorial, gap tweaking (water flows faster from room to room), UPnP error messages, input keys in array, underwater aiming tweaking, tons of misc stuff commit more often ffs

Lidgren.Network/NetTuple.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Lidgren.Network
+{
+	// replace with BCL 4.0 Tuple<> when appropriate
+	internal struct NetTuple<A, B>
+	{
+		public A Item1;
+		public B Item2;
+
+		public NetTuple(A item1, B item2)
+		{
+			Item1 = item1;
+			Item2 = item2;
+		}
+	}
+}