RedditLemmyImporter 0.3

Changes

• The project is now generic so that it works for more than just the r/GenZhou archive. 🎉
• Easier-to-read byline format.
• Correctly handle relative URLs in cases when posts link to other posts using the rare /r/subreddit/id36 syntax.

Migration notes

• Command-line usage has changed.
• Because this is a generic importer now, GenZhouArchive.json is no longer packaged with this project. It'll still work as an input file if you download it separately, but you now must provide the --json-pointer=/json option at the command line because the default expected JSON format has changed. See the README for more info.