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/FileNames.cpp

@@ -145,7 +145,7 @@ wxString FileNames::FormatWildcard( const FileTypes &fileTypes )
    }
 }
 
-bool FileNames::CopyFile(
+bool FileNames::DoCopyFile(
    const FilePath& file1, const FilePath& file2, bool overwrite)
 {
 #ifdef __WXMSW__