suggest to include content id (e.g., sha256 hash) of image used to measure intertegular distance

[jhpoelen]

To aid linking of digital images used to measure intertegular distance in Note for Nature, suggest to include the content id (e.g., sha256 hash) of the image in addition to including their filenames. With this content id, we can verify (and retrieve!) the exact image used to measure the trait.

@seltmann curious to hear your thoughts on this, and happy to help build tools to (automatically) calculate the sha256 URIs for images or other digital content.