[packagekit] Do we need a Resolve() method?

[Richard Hughes]

I think we need a Resolve() method that can take "openoffice-clipart"
and turn it into "openoffice-clipart;1.234;i386;fedora" for the
circumstance that we know the _exact_ package name "openoffice-clipart"
but want to find the package_id so we can install it.

This would let other programs just install using a simple client side
resolve and then install, rather than having to hardcode a packageid, or
get the backends to decode a partial package_id. It also lets us do
"pkcon install openoffice" rather than using the packageid. Comments?

Richard.