Include binary update on release update

[pVesian]

Hello,

It would be great to have a binary update when there's a new release. Since https://addons.mozilla.org/fr/firefox/addon/wallabagger/ hasn't been updated in a while and the zip dates back a few versions it has to be done by hand. It's not a big bother for someone who knows how to do it but not for someone who doesn't. I think it would help accessibility.

Thanks