Sunvox-dll-python

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- Add Raspberry Pi version of SunVox DLL.

- Add ``sunvox.SUNVOX_COPYRIGHT_NOTICE`` constant, for use in apps
that make use of this package.

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- Update SunVox DLL to 1.9.3b (1.9.3.1).

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- Update SunVox DLL to 1.9.3.0.

- Add support for Windows 64-bit.

- Correct notation of sharps/flats to match SunVox.

- Improvements to buffered processes.

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- Initial release.