Example metadata blob for each version

[clbarnes]

Storing example images is too much data for git, but a few 1kB blobs would be fine and make testing much easier.

• [ ] v0? (shared metadata)
• [ ] v1
• [ ] v2
• [ ] v3
• [ ] v4
• [ ] v5
• [ ] v6
• [ ] v7
• [x] v8
• [ ] v9