reworking livetweet threads

1. add front matter
2. delete excess stuff
   • what the hell does this mean 📌
3. image paths
   • find: /images/livetweets
   • replace: /images/artifacts/livetweets
4. photoset class
   • find: “pics”
   • replace: “photoset”
5. remove .html (check if there r other pages with it)
6. add “/artifacts/(threadpath)/” to pagination
7. find all “thumbnail-image one” and move them out of the “photoset” div
8. delete all empty “photoset” divs
9. delete all “one” class