Update release notes and reorder in an anti-chronological manner

[julsraemy]

• Addition of V2 and V3 release notes
• Anti-chronological order
• Fix typos

[julsraemy]

@subotic Build and Test is failing due to:
error: downloading 'https://www.exiv2.org/builds/exiv2-0.27.2-Source.tar.gz' failed
And indeed exiv2.org has been down for more than a week - https://www.isitdownrightnow.com/exiv2.org.html

[julsraemy]

@lrosenth @subotic This PR is still failing but for another reason: https://github.com/dasch-swiss/sipi/runs/2542386346?check_suite_focus=true#step:7:2088. Could you check?

[subotic]

@julsraemy bintray has shutdown. I moved the files to a new Github repository.

[julsraemy]

@julsraemy bintray has shutdown. I moved the files to a new Github repository.

Thank you @subotic.