[packagekit] Depends

[Richard Hughes]

I've just noticed:

the GetDeps method allows us to get the packages that this package
depends on, but not packages that depend on this package, if you see
what I mean. I need this for the "are you sure you want to remove this
package UI".

Should I add a boolean flag (b=depends_on_us) or just a whole new method:

GetDepsForPackage
WhatDepsOnPackage

Better names/variables welcome.

Richard.