Added an option and support for outputting the needed string interop includes.

src/Generator/Driver.cs

@@ -169,6 +169,7 @@ namespace Cxxi
         public bool Verbose = false;
         public bool ShowHelpText = false;
         public bool OutputDebug = false;
+        public bool OutputInteropIncludes = true;
         public bool GenerateLibraryNamespace;
         public string OutputNamespace;
         public string OutputDir;

src/Generator/Generators/CLI/CLISourcesTemplate.cs

@@ -24,6 +24,10 @@ namespace Cxxi.Generators.CLI
                 Options.WrapperSuffix);
 
             GenerateForwardReferenceHeaders();
+
+            if (Options.OutputInteropIncludes)
+                WriteLine("#include <clix.hpp>");
+
             NewLine();
 
             WriteLine("using namespace System;");