Remove permalink, regenerate URL instead

[bagage]

Instead of having a "permalink" somewhere on the website, it would be better if the URL is regenerated automatically on change: for instance using Leaflet hash or one that is still maintained.

This would be a great improvement and is part of why I don't like about #56 new-version.

[nrenner]

Yes, switching to leaflet-hash (or whatever) is one of the tasks with higher priority, as most maps use a hash URL nowadays and people are used to that.

[nrenner]

Recently stumbled upon leaflet-fullHash that also supports active layers (current Permalink control adds the active base layer only).

Ideally existing links and bookmarks would still work.

[bagage]

Fixed via #74.