Slack Emoji Downloader
Using this script, you can download your Slack team's entire emoji set to disk! To run it, you'll need a Slack API token. You can follow a process like this to get one.
To Run It
$ go run download.go -output <directory> -token <api_token>
Slack Emoji Uploader
I need to figure out of the uploader still works, but at least the downloader is fixed.