Add an update option to upload/download feature

[mecrider]

Is there anything in the Sweech HTTP API that would let you download missing and updated files (similar to --keep)? This would allow a repository of files on a server to be updated as needed, and updates to be pushed out to devices without pushing the whole repository every time.

[alberthier]

I've investigated this kind of feature. My main concern is that it requires that both devices have a correctly configured date and time. If one of them is off, some date comparisons might lead to files being replaced erroneously.

I could maybe add a check to ensure that both devices are in sync before proceeding to the update

[Amit-CBS]

The web app can be improved a lot. Feature to view thumbnails from within the folder. Rotation of pics. Zoom in/out.