Add header indicating file was autogenerated

source/Bottle/Program.cs

@@ -11,6 +11,9 @@ namespace Bottle
 {
     public class Program
     {
+        public static string Header = "/*\n\nThis code was autogenerated by Bottle. Do not manually edit.\n\n*/";
+
+
         private static void Usage()
         {
             Console.WriteLine("Bottle\nJson to C# transformer\n\nBottle [JsonFile] [OutputFile]");
@@ -41,6 +44,8 @@ namespace Bottle
 
                 MirrorWriter bw = new MirrorWriter();
 
+                bw.WriteLine(Header);
+
                 bw.WriteLine($"using System;");
 
                 bw.WriteLine();