* This has a very rudimentary language selector for the Chinese version. I
think this can be improved using only CSS. One idea is to use the :lang
selector and then URLs with the language code in the fragemnt, e.g. `#zh`
or `#de`. Then there could be a row of languages, each clickable to a
link that adds the language to the fragment.
* Removing `/repo` means that this will no longer ignore a symlink or file
called `repo` in the root of this project. I couldn't find a way to keep
that and still have functional exceptions for the index files.
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