[packagekit] Keep trace of dilectly installed packages

[Anders F Björklund]

Richard Hughes wrote:

> So only the key application (what the user wants) is passed to
> InstallPackages. This is the one you would add to the world list. The
> other deps would just be downloaded, built and installed, without
> being added to the world list. The other deps don't get passed to
> InstallPackages.

This is also how it would work in Smart, the other dependencies would
get flagged with "auto" - meaning they were automatically installed.

Thus you can separate between which packages were directly requested,
and which were just installed to fulfill dependencies (= auto flag).

--anders