Add a button for downloading the airway prediction in NIfTI format

[tonycwk]

The airway prediction in NIfTI format is useful for model performance evaluation.

The current application produces the airway prediction in NIfTI format, however, it is not accessible through the web interface.

Therefore, it is very useful to add a button for downloading this file.

[andreped]

Thanks for the great suggestion, @tonycwk! :]

I can add support for this feature now. Will let you know when the PR has been merged.

[andreped]

@tonycwk Demo should now have a download button. You will need till inference is completely finished, before clicking download.

Test the updated deployment at:
https://huggingface.co/spaces/andreped/AeroPath

[andreped]

@tonycwk Sadly, there is a bug with Docker build. So deployment on Hugging Face is now broken.

This was because I upgraded Gradio to the latest version in the aforementioned PR.

I will make a bugfix for this now!

[andreped]

I will make a bugfix for this now!

Made the fix for it in 1a46c84 and now deployment works.

Found another issue causing the download button not to work in Hugging Face. Made a fix for it now, so I believe the feature is completely ready for use in the deployed instance, @tonycwk :]