Issue #276 - introduce class BSTR_Argument

src/plugin/ATL_Deprecate.cpp

+/**
+ * \file ATL_Deprecate.cpp Transient functions used during the ATL removal process.
+ */
+
+#include "ATL_Deprecate.h"
+
+std::wstring to_wstring(ATL::CString& s)
+{
+  std::wstring result(s.GetBuffer());
+  s.ReleaseBuffer();
+  return result;
+}
+
+
+ATL::CString to_CString(const std::wstring& s)
+{
+  return ATL::CString(s.c_str());
+}