Adding Fiio as a new data source

[Sha1rholder]

Chinese Audio Brand Fiio has started a plan to measure the FR of a lot of headphones. This is one of the results: https://sha1rholder.blob.core.windows.net/temp/nan-7%20planar%20magnetic%20headphone%20data.7z

Could you consider adding Fiio to the data sources, as they may provide more frequency response measurements of headphones in the future? I can help negotiate with them about sharing test data and info about testing equipment, which will not cause you too much trouble

Thanks for your consideration!