Made some updates to the community archiver

Refactored code to be more object oriented. Moved errors to separate functions so one doesn't crash the whole project.

Merged code from another contribute that will download pictures from outside sources and allows you to specify the chunk size.

Works pretty well now I think. I downloaded the entire meme community from lemmy.ml in about 10 minutes. Pictures, gifs, videos everything.

Still no comments. That would require a bunch of css I think. I want to work on something else on the actual site next.