I have added some better progress indication to downloads now, which should make it easier to see how fast zsync is going, how near it is to completion etc. I have also fixed a SEGV that you could run into using locally downloaded .zsync files. So I hope this version is a little more user-friendly.

The big feature in this version is recompression. zsync will now compress a file after you download it if the original was compressed; and it does its best to make the gzip file identical with the original (fixing the timestamp, filenames etc in the gzip header). I think this opens up a whole new area of applications, but I'll defer talking about that until I can put up some kind of demonstration.