Document rotation

[dericed]

No description provided.

[retokromer]

I suggest to add here specular images as well (vertical and/or horizontal flipping), because it’s of the same family.

Context: One film reel can be digitised emulsion to sensor or base to sensor, from platter A to platter B or from platter B to platter A, and there are four combinations for the rotation of the platters. In case of highly damaged films, it’s actually the film itself who decides which configuration is chosen, not the operating person (no joke!). It’s useful when the raw scan can be played correctly without having to modify the player’s parameters.

[dericed]

@retokromer I added a new issue for your idea rather than extend the scope of the pr, see #327

[retokromer]

@dericed That’s fine with me. Thank you!

[robUx4]

OK with me but adding ProjectionPoseYaw we should probably mention a rotation on what axis or in more simple terms what kind of rotation this is.

[dericed]

I'm going to merge as IMHO this pr address #269. @retokromer if you want please move your comment in #326 (comment) to a new issue, I'll consider it out of scope with this pr.

[retokromer]

@dericed Done in #330.