Attribution of images in test/data/images

[artidoro]

Fixes #697

• I added the attribution for the images located in the test/data/images folder.
• I used the citation format indicated in wikipedia's "best practices for attributions"

Note: I used the same readme that provides citations for the datasets located in test/data and separated it in two parts. I think it makes more sense to keep the citations for the data and images in the folder in a single file.

[dnfclas]

All CLA requirements met.

[Ivanidzo4ka]

[Ivanidzo4ka]

Unfortunately one of builds failed, and we currently don't have infrastructure to restart build (We can queue another one, but it wouldn't be picked up by git). So only way to retrigger build is to push another change.

[codemzs]

That or just modifying the commit message will also retrigger the build
git commit --amend -m "Just to trigger the build"
git push --force

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In reply to: 417383501 [](ancestors = 417383501)

[artidoro]

Ok will amend the commit then! Thank you

[TomFinley]