Notify user if command failed

Fixed /heal not working from server console (cant heal self from console now)
/playing from console now outputs the same as the overridden playing
Using args.Player or args.TPlayer in commands instead of Index

TShockAPI/Tools.cs

@@ -101,6 +101,7 @@ namespace TShockAPI
             Log.Info(string.Format("Broadcast: {0}", msg));
 
         }
+
         public static void Broadcast(string msg, Color color)
         {
             Broadcast(msg, color.R, color.G, color.B);