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OK, I'll change

OK, I'll change LibRaw_(big)file_datastream internals to save std::string instead of just pointer. It is safer way.
0.15 still in pre-Beta state, so I may change ABI/internals without saving compatibility :)

Also, I'll add open_wfile() call (under #ifdef WIN32) in next Alpha.

-- Alex Tutubalin @LibRaw LLC