project maintainer wanted

I personally rather focus on developing `borgbackup` (the CLI command) and thus I was not active here much recently.

So, if somebody wants to step up maintaining `borgweb`, feel free to do so.

Hints / wishes about this:
- borgweb is intended to be a very simple thing for a specific use case and it should stay like that - it should not become a full web interface for all what borg offers.
- there are some open issues / pull requests on this issue tracker, please work on existing stuff first before adding new stuff.
- For the maintainer, I guess it only makes sense if you personally use the code somehow.