Added support for media to the Dumbo tweet importer (for self-hosters). Also updated the patches to work with Mastodon 4.x.

The Twitter dump does not contain original photos, weirdly, so it reaches out and downloads the original from Twitter before uploading.

https://github.com/JakeWharton/dumbo

Example from first week at Square way back when: https://mastodon.jakewharton.com/@jw/87256754723374259