One big problem with script.module.routing is that URLs (or anything with slashes) cannot be passed through (needs explicit quote/unquote). Another problem is that the global plugin object needs to be passed on as well, while I had hoped that this would not be needed. So it's an even more radical change than I had hoped.

I have some working code for some of the menu listings, but it requires a lot more work. Feel free to discuss any design changes in the current PR, because there's a lot going on.

I don't like script.module.routing, I think a separate navigation function is good enough. For instance: https://github.com/mediaminister/plugin.video.vrt.nu/blob/fast/resources/lib/vrtnu/vrtnu.py#L24

So my approach for this will be to reorganize everything except the existing routing, so that existing paths do not break. However, I think we need to redesign that part at some point as well. But we can go to great length without affecting this for now.

Some of this will happen in another PR, some day.