Merge pull request #108 from ImageMarkup/add-snapshot-note-readme

Merge pull request #106 from ImageMarkup/permission-errors-on-exit

Silence permission errors for deleting partially downloaded images

Merge pull request #103 from ImageMarkup/fix-progress-message

Clean up the progress message

Merge pull request #96 from ImageMarkup/ci

Build linux specifically on Ubuntu 20

Merge pull request #95 from ImageMarkup/remove-diagnosis-support

Drop legacy diagnosis support

Merge pull request #95 from ImageMarkup/remove-diagnosis-support

Drop legacy diagnosis support