use PackageKitBrowserPlugin install button

[jmlich]

See
https://fedoraproject.org/wiki/Features/PackageKitBrowserPlugin
and
http://cgit.freedesktop.org/packagekit/plain/contrib/browser-plugin/README

It'd be cool to be able to do that, but most browsers are dropping NPAPI support. I'm not sure what that means for features like this.

[jmlich]

It might be interesting to fork apturl and adjust it to use with packagekit and rpm packages
https://launchpad.net/ubuntu/+source/apturl