Export Transcription.orientation

Closes #1487 (closed)

I did not bump the export version simply because it will be done with #1486 (closed), and bumping twice is not necessary unless we release Arkindex in between both changes.

changed milestone to %Arkindex 1.4.2

requested review from @babadie

assigned to @erwanrouchet

mentioned in merge request doc!91 (merged)

added 1 commit

• d5304f2b - Import orientations in load_export

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added 6 commits

• d5304f2b...f3225da1 - 4 commits from branch master
• 42fcb17d - Export Transcription.orientation
• a8e20cc1 - Import orientations in load_export

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I got a nice export with orientation

enabled an automatic merge when the pipeline for a8e20cc1 succeeds

merged