Update to allow all self tests to be run and to allow running with tags

include/catch_runner.hpp

@@ -108,6 +108,8 @@ namespace Catch {
         std::set<TestCase> m_testsAlreadyRun;
     };
 
+#if !defined(INTERNAL_CATCH_VS_MANAGED) && !defined(INTERNAL_CATCH_VS_NATIVE)
+
     class Session {
         static bool alreadyInstantiated;
 
@@ -232,6 +234,8 @@ namespace Catch {
 
     bool Session::alreadyInstantiated = false;
 
+#endif // !VS_MANAGED && !VS_NATIVE
+
 } // end namespace Catch
 
 #endif // TWOBLUECUBES_CATCH_RUNNER_HPP_INCLUDED