Opera store

[PauluzzS]

It might be nice to add the extension to the Opera store. Although us Opera users are often used to having to install Chrome extensions with the "Install Chrome Extensions"-extension, it gives more confidence if the extension is actually in the Opera store, as it means it underwent Opera review. I think publishing shouldn't bee too difficult, as all the requirements seem to already be there: https://dev.opera.com/extensions/publishing-guidelines/