Make new CSS preprocessor
Not only is our current SCSS compiler extremely slow, but it also no longer works with new versions of Go: https://github.com/wellington/go-libsass/issues/84
This is probably a higher priority now.
Generate thumbnails for videos and reencode images
I think avatars are using the new asset system by now, right? I think we should re-encode basically all the images in our whole asset system to smaller sizes / formats, and then we can start using…