allow to drop .json.gz files

[mariemoinet]

Some tools like UCSC UShER provide .json.gz files "ready" to be uploaded in Auspice... but .gz files don't seem to be accepted. A feature to accept .json.gz and unzip them directly in Auspice would be very handy.

[jameshadfield]

Yeah, this seems like a sensible addition for us to make. AFAIK we can't leverage the browser's decompression to do this and will have to use something like JSZip, but I don't have a problem with that for auspice.us.