Lack of update information

[Rahul Sundaram <sundaram fedoraproject org>]

Hi,

A while back, I tried to selectively update some packages and noticed 
that the update information provided by package maintainers (seen via 
PackageKit) is sorely lacking.

* Update foo to upstream 2.16.2

Was very common, which is practically useless since it doesn't refer to 
upstream or downstream bugzillas or feature list or changelog. Would it 
be useful to introduce some guidelines to cover this?

Rahul