this unfortunately means I had to cut some features (bye bye commit history! for now)
stuff's not quite 100% working just yet (like branch links, which were and are still broken)
we also don't have content_version impls just yet
implement basic version history support; there's now an icon in the footer that lets you see the previous versions and their sources
I'm a bit worried about spoilers but honestly it's yet another way to hint yourself at the cool secrets so I don't mind
