Regular markdown links not working with non-latin chars

[rinpatch]

Some zettels in my zettelkasten have ids in Russian, however it seems like whatever is used to transform markdown links only handles paths with latin characters and leaves everything else as-is. It would be nice if non-latin charachters were allowed or a warning was printed if that is impossible.

Neuron version: 1.0.1.0
Steps to reproduce:

1. Create a file named тест.md
2. Link to it from another zettel like so [test](./тест.md)
3. Generate the static site with neuron rib

Expected behavior: the generated HTML for the zettlel has a link to тест.md
Actual behavior: the link is left as if it was plaintext

[srid]

Does it work for [[тест]]?

[rinpatch]

Yeah, it does

[srid]

Might be related to #543

(Also you might want to drop the ./ in there).