Make testing dataset publicly available

[AlexTMjugador]

During the development of OptiVorbis, I created a dataset of Ogg Vorbis files for testing and evaluating it, which is mentioned in the README. So far, this dataset has been sitting on my hard disk and on a digital medium submitted with my thesis documentation, neither of which are accessible to the wider community.

In the interest of making it easier to reproduce the results described and to facilitate further research by interested parties, I think it's a good idea to make the dataset public in a free, reliable, research-friendly, and long-term way.

My main concerns with this idea are as follows:

• There is no commercial file hosting service that I know of that fits the bill. Fortunately, I recently stumbled upon Zenodo, which is supported by EU institutions and seems quite suitable for this purpose, as it assigns a DOI to its uploads.
• Intellectual property: in any case, the dataset files can be traced back to their original Freesound submission, but that doesn't mean that their licensing is compatible with this kind of distribution.

Now that file hosting is no longer an issue, only the intellectual property concerns remain, so it's wise for me to at least write this issue so that I don't forget about it and work on it can get done. If anyone has expert knowledge about my intellectual property concerns, please feel free to comment and give your perspective.