[packagekit] New backend functionality: GetDetailsLocal

[Richard Hughes]

Hi all,

I've just added a new backend method we need for several new
applications. It's called GetDetailsLocal and is designed to get
details about local (i.e. not yet installed) package files.

I've just added support for this in the hawkey backend, and I'd very
much appreciate it anyone interested could add the new method in the
next few weeks. We'll be optionally using it in gnome-software from
tomorrow. :)

Questions welcome, thanks.

Richard