use-cases: new datasets registry case study, et al.

[jorgeorpinel]

Fix #674
Fix #735
Fix #487

[shcheklein]

@jorgeorpinel the data registry use case is perfect - super cool :) just a few minor comments in other places, let's try to draw an image on something and merge it.

Also, just as matter of "marketing" and SEO optimization is there a place we can put something like "like Git for your S3" and/or "Git for your cloud storage"? To coin the term (if it's not yet).

[jorgeorpinel]

Also, just as matter of "marketing" and SEO optimization is there a place we can put something like "like Git for your S3" and/or "Git for your cloud storage"? To coin the term (if it's not yet).

Forgot to add this. Will open separate PR.