Can build for windows without precompiled headers...

... Requires some more wx header inclusions, a renaming of CopyFile (to avoid
colliding with a certain macro changing it to CopyFileW), and an explicit
deletion of a copy constructor and assignment (to avoid generation of
std::vector members for an incomplete type)

src/export/ExportOGG.cpp

@@ -23,6 +23,7 @@
 
 #include <wx/log.h>
 #include <wx/slider.h>
+#include <wx/stream.h>
  
 #include <vorbis/vorbisenc.h>