Simplify Bullfight (C#) folder structure

17_Bullfight/csharp/Reward.cs

@@ -0,0 +1,13 @@
+namespace Game
+{
+    /// <summary>
+    /// Enumerates the different things the player can be awarded.
+    /// </summary>
+    public enum Reward
+    {
+        Nothing,
+        OneEar,
+        TwoEars,
+        CarriedFromRing
+    }
+}